1917 01 99.99 -99.99  25.60 
1917 02 99.99 -99.99  24.90 
1917 03 99.99 -99.99  25.80 
1917 04 99.99 -99.99  26.40 
1917 05 99.99 -99.99  27.20 
1917 06 99.99 -99.99  27.10 
1917 07 99.99 -99.99  27.10 
1917 08 99.99 -99.99  27.40 
1917 09 99.99 -99.99  27.90 
1917 11 99.99 -99.99  25.40 
1917 12 99.99 -99.99  24.70 
1918 01 99.99 -99.99  24.70 
1918 02 99.99 -99.99  25.70 
1918 03 99.99 -99.99  26.10 
1918 04 99.99 -99.99  26.80 
1918 05 99.99 -99.99  27.20 
1918 06 99.99 -99.99  26.60 
1918 07 99.99 -99.99  26.90 
1918 08 99.99 -99.99  27.70 
1918 09 99.99 -99.99  27.80 
1918 10 99.99 -99.99  27.40 
1918 11 99.99 -99.99  26.90 
1918 12 99.99 -99.99  26.30 
1919 01 99.99 -99.99  25.10 
1919 02 99.99 -99.99  26.30 
1919 03 99.99 -99.99  26.90 
1919 04 99.99 -99.99  26.90 
1919 05 99.99 -99.99  28.20 
1919 06 99.99 -99.99  27.90 
1919 07 99.99 -99.99  28.00 
1919 08 99.99 -99.99  28.50 
1919 09 99.99 -99.99  27.80 
1919 10 99.99 -99.99  27.40 
1919 11 99.99 -99.99  27.60 
1919 12 99.99 -99.99  26.70 
1920 01 99.99 -99.99  26.10 
1920 02 99.99 -99.99  25.90 
1920 03 99.99 -99.99  26.40 
1920 04 99.99 -99.99  27.60 
1920 05 99.99 -99.99  28.20 
1920 06 99.99 -99.99  27.80 
1920 07 99.99 -99.99  27.90 
1920 08 99.99 -99.99  28.30 
1920 09 99.99 -99.99  28.30 
1920 10 99.99 -99.99  27.30 
1920 11 99.99 -99.99  26.60 
1920 12 99.99 -99.99  26.20 
1921 01 99.99 -99.99  25.60 
1921 02 99.99 -99.99  25.90 
1921 03 99.99 -99.99  26.20 
1921 04 99.99 -99.99  27.40 
1921 05 99.99 -99.99  27.70 
1921 06 99.99 -99.99  27.60 
1921 07 99.99 -99.99  27.90 
1921 08 99.99 -99.99  27.80 
1921 09 99.99 -99.99  27.80 
1921 10 99.99 -99.99  27.60 
1921 11 99.99 -99.99  26.70 
1921 12 99.99 -99.99  26.20 
1922 01 99.99 -99.99  25.60 
1922 02 99.99 -99.99  25.60 
1922 03 99.99 -99.99  26.30 
1922 04 99.99 -99.99  27.40 
1922 05 99.99 -99.99  28.10 
1922 06 99.99 -99.99  27.70 
1922 07 99.99 -99.99  28.40 
1922 08 99.99 -99.99  28.20 
1922 09 99.99 -99.99  27.80 
1922 10 99.99 -99.99  27.60 
1922 11 99.99 -99.99  27.20 
1922 12 99.99 -99.99  26.00 
1923 01 99.99 -99.99  25.80 
1923 02 99.99 -99.99  25.80 
1923 03 99.99 -99.99  26.60 
1923 04 99.99 -99.99  27.20 
1923 05 99.99 -99.99  28.10 
1923 06 99.99 -99.99  27.20 
1923 07 99.99 -99.99  27.50 
1923 08 99.99 -99.99  27.40 
1923 09 99.99 -99.99  27.80 
1923 10 99.99 -99.99  26.90 
1923 11 99.99 -99.99  26.20 
1923 12 99.99 -99.99  26.20 
1924 01 99.99 -99.99  26.20 
1924 02 99.99 -99.99  25.40 
1924 03 99.99 -99.99  26.30 
1924 04 99.99 -99.99  27.80 
1924 05 99.99 -99.99  28.80 
1924 06 99.99 -99.99  27.70 
1924 07 99.99 -99.99  27.70 
1924 08 99.99 -99.99  27.80 
1924 09 99.99 -99.99  28.10 
1924 10 99.99 -99.99  26.90 
1924 11 99.99 -99.99  25.40 
1924 12 99.99 -99.99  25.70 
1925 01 99.99 -99.99  25.30 
1925 02 99.99 -99.99  25.10 
1925 03 99.99 -99.99  25.70 
1925 04 99.99 -99.99  26.40 
1925 05 99.99 -99.99  27.70 
1925 06 99.99 -99.99  27.40 
1925 07 99.99 -99.99  27.70 
1925 08 99.99 -99.99  28.60 
1925 09 99.99 -99.99  27.70 
1925 10 99.99 -99.99  27.90 
1925 11 99.99 -99.99  26.90 
1925 12 99.99 -99.99  26.20 
1926 01 99.99 -99.99  25.70 
1926 02 99.99 -99.99  25.30 
1926 03 99.99 -99.99  26.90 
1926 04 99.99 -99.99  28.10 
1926 05 99.99 -99.99  28.40 
1926 06 99.99 -99.99  28.30 
1926 07 99.99 -99.99  28.80 
1926 08 99.99 -99.99  28.90 
1926 09 99.99 -99.99  28.90 
1926 10 99.99 -99.99  27.40 
1926 11 99.99 -99.99  26.30 
1926 12 99.99 -99.99  26.20 
1927 01 99.99 -99.99  24.90 
1927 02 99.99 -99.99  25.70 
1927 03 99.99 -99.99  26.30 
1927 05 99.99 -99.99  28.40 
1927 06 99.99 -99.99  27.80 
1927 07 99.99 -99.99  27.70 
1927 08 99.99 -99.99  28.30 
1928 08 99.99 -99.99  27.90 
1928 09 99.99 -99.99  27.70 
1928 10 99.99 -99.99  27.20 
1929 08 99.99 -99.99  27.80 
1929 09 99.99 -99.99  27.40 
1929 10 99.99 -99.99  26.40 
1930 08 99.99 -99.99  28.30 
1930 09 99.99 -99.99  27.80 
1930 10 99.99 -99.99  28.00 
1931 08 99.99 -99.99  27.80 
1931 09 99.99 -99.99  28.10 
1931 10 99.99 -99.99  26.60 
1932 08 99.99 -99.99  27.60 
1932 09 99.99 -99.99  27.90 
1932 10 99.99 -99.99  27.90 
1938 09 99.99 -99.99  27.70 
1938 10 99.99 -99.99  26.90 
1939 08 99.99 -99.99  28.80 
1939 09 99.99 -99.99  28.30 
1939 10 99.99 -99.99  28.30 
1940 09 99.99 -99.99  28.00 
1940 10 99.99 -99.99  27.00 
1940 11 99.99 -99.99  26.30 
1940 12 99.99 -99.99  26.20 
1941 01 99.99 -99.99  25.60 
1941 02 99.99 -99.99  25.70 
1941 03 99.99 -99.99  26.40 
1941 04 99.99 -99.99  28.20 
1941 05 99.99 -99.99  27.70 
1941 06 99.99 -99.99  28.90 
1941 07 99.99 -99.99  28.80 
1941 08 99.99 -99.99  29.20 
1941 09 99.99 -99.99  29.20 
1941 10 99.99 -99.99  27.80 
1941 11 99.99 -99.99  26.90 
1941 12 99.99 -99.99  27.00 
1942 01 99.99 -99.99  25.50 
1942 02 99.99 -99.99  25.90 
1942 03 99.99 -99.99  27.10 
1942 04 99.99 -99.99  27.40 
1942 05 99.99 -99.99  27.80 
1942 06 99.99 -99.99  28.20 
1942 07 99.99 -99.99  28.00 
1942 08 99.99 -99.99  27.70 
1942 09 99.99 -99.99  27.40 
1942 10 99.99 -99.99  27.40 
1942 11 99.99 -99.99  26.80 
1942 12 99.99 -99.99  25.90 
1943 01 99.99 -99.99  26.10 
1943 02 99.99 -99.99  25.40 
1943 03 99.99 -99.99  26.60 
1943 04 99.99 -99.99  26.70 
1943 05 99.99 -99.99  27.30 
1943 06 99.99 -99.99  27.60 
1943 07 99.99 -99.99  28.30 
1943 08 99.99 -99.99  28.90 
1943 09 99.99 -99.99  28.80 
1943 10 99.99 -99.99  27.90 
1943 11 99.99 -99.99  26.60 
1943 12 99.99 -99.99  25.70 
1944 01 99.99 -99.99  25.40 
1944 02 99.99 -99.99  26.20 
1944 03 99.99 -99.99  27.10 
1944 04 99.99 -99.99  27.70 
1944 05 99.99 -99.99  27.90 
1944 06 99.99 -99.99  27.30 
1944 07 99.99 -99.99  28.20 
1944 08 99.99 -99.99  28.10 
1944 09 99.99 -99.99  28.40 
1944 10 99.99 -99.99  26.90 
1944 11 99.99 -99.99  26.30 
1944 12 99.99 -99.99  25.20 
1945 01 99.99 -99.99  25.20 
1945 02 99.99 -99.99  25.90 
1945 03 99.99 -99.99  26.90 
1945 04 99.99 -99.99  27.60 
1945 05 99.99 -99.99  27.50 
1945 06 99.99 -99.99  27.90 
1945 07 99.99 -99.99  28.00 
1945 08 99.99 -99.99  28.10 
1945 09 99.99 -99.99  27.40 
1945 10 99.99 -99.99  27.30 
1945 11 99.99 -99.99  26.20 
1945 12 99.99 -99.99  25.80 
1946 01 99.99 -99.99  25.80 
1946 02 99.99 -99.99  26.20 
1946 03 99.99 -99.99  26.30 
1946 04 99.99 -99.99  27.40 
1946 05 99.99 -99.99  28.80 
1946 06 99.99 -99.99  28.80 
1946 07 99.99 -99.99  28.90 
1946 08 99.99 -99.99  28.60 
1946 09 99.99 -99.99  28.10 
1946 10 99.99 -99.99  27.80 
1946 11 99.99 -99.99  27.20 
1946 12 99.99 -99.99  26.20 
1947 01 99.99 -99.99  26.80 
1947 02 99.99 -99.99  25.60 
1947 03 99.99 -99.99  27.00 
1947 04 99.99 -99.99  28.00 
1947 05 99.99 -99.99  28.70 
1947 06 99.99 -99.99  28.30 
1947 07 99.99 -99.99  27.80 
1947 08 99.99 -99.99  28.00 
1947 09 99.99 -99.99  28.20 
1947 10 99.99 -99.99  28.10 
1947 11 99.99 -99.99  27.60 
1947 12 99.99 -99.99  26.20 
1948 01 28.19  22.77  25.48 
1948 02 28.75  23.72  26.23 
1948 03 29.44  24.65  27.04 
1948 04 30.23  24.14  27.18 
1948 05 30.85  25.49  28.17 
1948 06 30.35  25.16  27.75 
1948 07 30.55  25.10  27.82 
1948 08 31.06  25.44  28.25 
1948 09 31.50  26.43  28.96 
1948 10 30.36  24.88  27.62 
1948 11 29.72  25.00  27.36 
1948 12 28.95  24.22  26.58 
1949 01 28.18  23.41  25.79 
1949 02 28.70  23.38  26.04 
1949 03 29.19  23.75  26.47 
1949 04 30.14  25.45  27.79 
1949 05 30.58  25.11  27.84 
1949 06 30.23  25.76  27.99 
1949 07 30.73  25.35  28.04 
1949 08 31.65  25.83  28.74 
1949 09 31.01  25.23  28.12 
1949 10 31.01  25.06  28.03 
1949 11 27.87  23.44  25.65 
1949 12 27.95  23.01  25.48 
1950 01 27.52  23.10  25.31 
1950 02 27.70  23.21  25.45 
1950 03 28.65  23.77  26.21 
1950 04 29.23  23.89  26.56 
1950 05 30.60  25.55  28.07 
1950 06 29.60  25.18  27.39 
1950 07 29.93  25.24  27.58 
1950 08 31.04  25.33  28.18 
1950 09 31.36  25.50  28.43 
1950 10 29.72  24.16  26.93 
1950 11 27.94  23.52  25.73 
1950 12 27.33  22.55  24.93 
1951 01 27.56  22.65  25.10 
1951 02 27.15  22.12  24.63 
1951 03 28.71  23.29  26.00 
1951 04 29.96  24.97  27.46 
1951 05 31.16  24.97  28.06 
1951 06 30.23  25.04  27.63 
1951 07 30.29  25.74  28.01 
1951 08 31.39  25.84  28.61 
1951 09 31.05  25.65  28.34 
1951 10 30.97  25.60  28.28 
1951 11 29.43  24.68  27.05 
1951 12 29.33  24.77  27.05 
1952 01 28.73  23.75  26.24 
1952 02 28.17  23.53  25.85 
1952 03 29.78  25.02  27.40 
1952 04 30.14  24.84  27.49 
1952 05 30.59  25.59  28.09 
1952 06 30.11  25.19  27.65 
1952 07 30.37  25.22  27.79 
1952 08 30.68  25.66  28.17 
1952 09 31.02  25.36  28.19 
1952 10 29.89  23.85  26.87 
1952 11 29.28  23.99  26.63 
1952 12 27.64  22.96  25.30 
1953 01 27.59  22.61  25.10 
1953 02 28.82  23.53  26.17 
1953 03 29.43  24.20  26.81 
1953 04 30.07  25.96  28.01 
1953 05 30.71  26.06  28.38 
1953 06 30.33  25.80  28.06 
1953 07 30.61  25.66  28.13 
1953 08 31.28  25.97  28.62 
1953 09 31.50  25.56  28.53 
1953 10 30.35  25.39  27.87 
1953 11 29.22  24.09  26.65 
1953 12 28.65  24.21  26.43 
1954 01 28.50  23.49  25.99 
1954 02 28.03  22.50  25.26 
1954 03 29.45  24.27  26.86 
1954 04 29.93  24.18  27.05 
1954 05 30.06  25.51  27.78 
1954 06 29.66  24.79  27.22 
1954 07 30.18  25.14  27.66 
1954 08 31.05  25.22  28.13 
1954 09 30.52  25.32  27.92 
1954 10 29.33  24.28  26.80 
1954 11 28.40  23.39  25.89 
1954 12 27.44  22.62  25.03 
1955 01 27.41  22.74  25.07 
1955 02 27.73  22.98  25.35 
1955 03 28.57  23.43  26.00 
1955 04 29.50  24.62  27.06 
1955 05 30.31  25.11  27.71 
1955 06 31.18  25.85  28.51 
1955 07 29.75  25.08  27.41 
1956 06 29.63  24.94  27.28 
1956 07 30.46  25.03  27.74 
1956 08 31.75  25.50  28.62 
1956 09 30.96  25.67  28.31 
1956 10 31.00  24.95  27.97 
1956 11 28.77  23.71  26.24 
1956 12 28.12  23.51  25.81 
1957 01 27.98  23.18  25.58 
1957 02 28.21  23.44  25.82 
1957 03 28.90  24.24  26.57 
1957 04 29.94  24.84  27.39 
1957 05 31.02  26.23  28.62 
1957 06 30.07  25.75  27.91 
1957 07 30.49  25.80  28.14 
1957 08 31.05  26.15  28.59 
1957 09 30.50  25.94  28.22 
1957 10 29.88  25.12  27.50 
1957 11 29.67  25.47  27.57 
1957 12 28.40  23.21  25.80 
1958 01 27.48  22.94  25.21 
1958 02 27.35  22.68  25.01 
1958 03 29.26  24.63  26.94 
1958 04 30.59  25.53  28.06 
1958 05 30.98  25.51  28.24 
1958 06 30.57  26.11  28.34 
1958 07 30.59  25.84  28.21 
1958 08 31.79  26.26  29.02 
1958 09 31.59  26.07  28.83 
1958 10 30.58  25.03  27.80 
1958 12 29.07  23.51  26.29 
1959 01 28.45  23.47  25.96 
1959 02 29.26  23.98  26.62 
1959 04 30.54  24.55  27.54 
1959 05 30.53  24.43  27.48 
1959 07 31.73  25.56  28.64 
1959 08 31.15  25.05  28.09 
1959 09 31.57  26.01  28.79 
1959 10 30.55  25.81  28.18 
1959 11 29.75  24.67  27.21 
1959 12 28.11  23.63  25.87 
1960 01 27.92  23.83  25.87 
1960 02 28.30  23.85  26.07 
1960 03 28.92  24.36  26.64 
1960 04 30.19  25.12  27.65 
1960 05 30.89  25.93  28.41 
1960 06 30.55  25.31  27.93 
1960 07 30.26  25.13  27.69 
1960 08 31.08  25.66  28.37 
1960 09 31.30  25.30  28.30 
1960 10 31.30  25.71  28.50 
1960 11 30.28  24.23  27.25 
1960 12 28.17  23.09  25.63 
1961 01 28.55  23.77  26.16 
1961 02 28.70  23.78  26.24 
1961 03 29.04  24.15  26.59 
1961 04 30.57  25.34  27.95 
1961 05 31.14  25.74  28.43 
1961 06 30.73  25.48  28.10 
1961 07 30.12  24.47  27.29 
1961 08 31.51  25.66  28.58 
1961 09 30.76  25.16  27.96 
1961 10 30.20  24.45  27.32 
1961 11 29.52  24.62  27.07 
1961 12 28.61  23.39  26.00 
1962 01 28.44  23.65  26.04 
1962 02 28.54  23.74  26.14 
1962 03 28.66  23.90  26.28 
1962 04 29.60  24.82  27.21 
1962 05 29.78  24.88  27.33 
1962 06 29.65  25.20  27.42 
1962 07 30.99  25.69  28.34 
1962 08 31.26  25.76  28.51 
1962 09 30.51  25.60  28.05 
1962 10 30.01  24.68  27.34 
1962 11 28.09  23.96  26.02 
1962 12 27.65  23.48  25.56 
1963 01 28.35  23.59  25.97 
1963 02 28.03  23.03  25.53 
1963 03 28.94  24.09  26.51 
1963 04 29.55  24.45  27.00 
1963 06 30.58  25.56  28.07 
1963 07 29.84  24.62  27.23 
1963 08 30.88  25.72  28.30 
1963 09 31.08  25.78  28.43 
1963 10 30.40  24.93  27.66 
1963 11 29.13  24.48  26.80 
1963 12 28.05  23.76  25.90 
1964 01 28.11  23.47  25.79 
1964 02 28.83  24.30  26.56 
1964 03 29.75  24.95  27.35 
1964 04 30.21  25.49  27.84 
1964 05 30.75  25.29  28.02 
1964 06 29.55  25.17  27.36 
1964 07 29.78  25.16  27.47 
1964 08 30.55  25.65  28.09 
1964 09 30.96  26.20  28.58 
1964 10 29.06  24.55  26.80 
1964 11 28.51  24.03  26.27 
1964 12 28.35  24.03  26.19 
1965 01 27.15  22.84  24.99 
1965 02 27.81  24.00  25.90 
1965 03 28.19  24.11  26.15 
1965 04 29.61  24.73  27.17 
1965 05 30.00  24.84  27.42 
1965 06 29.85  25.67  27.76 
1965 07 30.69  26.03  28.36 
1965 08 30.57  25.56  28.06 
1965 09 30.45  25.50  27.97 
1965 10 29.21  25.57  27.39 
1965 11 28.91  24.85  26.88 
1965 12 27.65  24.00  25.82 
1966 01 27.28  22.94  25.11 
1966 02 27.64  23.69  25.66 
1966 03 28.01  23.81  25.91 
1966 04 29.56  25.33  27.44 
1966 05 30.08  25.67  27.87 
1966 06 28.67  25.05  26.86 
1966 07 30.10  25.50  27.80 
1966 08 30.61  25.51  28.06 
1966 09 30.54  25.39  27.96 
1966 10 30.40  24.64  27.52 
1966 11 28.19  23.39  25.79 
1966 12 27.58  23.31  25.44 
1967 01 28.12  23.41  25.76 
1967 02 28.09  23.40  25.74 
1967 03 28.83  23.45  26.14 
1967 04 29.57  24.34  26.95 
1967 05 30.66  25.28  27.97 
1967 06 30.31  25.23  27.77 
1967 07 30.90  25.02  27.96 
1967 08 30.55  25.42  27.98 
1967 09 30.42  25.30  27.86 
1967 10 30.10  24.45  27.27 
1967 11 29.08  24.59  26.83 
1967 12 28.62  24.28  26.45 
1968 01 27.48  23.04  25.26 
1968 02 27.32  22.53  24.92 
1968 03 28.42  23.09  25.75 
1968 04 29.46  23.69  26.57 
1968 05 30.34  25.11  27.72 
1968 06 29.82  25.07  27.44 
1968 07 30.69  25.46  28.07 
1968 08 31.40  26.06  28.73 
1968 09 30.74  25.60  28.17 
1968 10 29.73  24.53  27.13 
1968 11 29.07  24.50  26.78 
1968 12 28.25  23.62  25.93 
1969 01 28.18  23.12  25.65 
1969 02 28.13  23.31  25.72 
1969 03 29.02  24.40  26.71 
1969 04 30.37  25.76  28.06 
1969 05 31.65  26.40  29.02 
1969 06 31.19  25.98  28.58 
1969 07 30.77  25.08  27.92 
1969 08 30.59  25.59  28.09 
1969 09 30.35  25.25  27.80 
1969 10 30.24  25.13  27.68 
1969 11 28.99  24.00  26.49 
1969 12 28.15  24.32  26.23 
1970 01 27.65  22.95  25.30 
1970 02 27.33  22.85  25.09 
1970 03 28.52  24.57  26.54 
1970 04 30.09  25.67  27.88 
1970 05 30.05  24.85  27.45 
1970 06 30.27  25.48  27.87 
1970 07 30.00  24.69  27.34 
1970 08 30.12  25.35  27.73 
1970 09 29.64  24.42  27.03 
1970 10 30.23  24.85  27.54 
1970 11 28.54  22.98  25.76 
1970 12 28.43  24.44  26.43 
1971 01 99.99 -99.99  27.20 
1971 02 99.99 -99.99  25.80 
1971 03 99.99 -99.99  26.40 
1971 04 99.99 -99.99  26.70 
1971 05 99.99 -99.99  27.90 
1971 06 99.99 -99.99  27.70 
1971 07 99.99 -99.99  27.90 
1971 08 99.99 -99.99  28.00 
1971 09 99.99 -99.99  30.30 
1971 10 99.99 -99.99  27.60 
1971 11 99.99 -99.99  26.80 
1971 12 99.99 -99.99  26.50 
1972 01 99.99 -99.99  25.80 
1972 02 99.99 -99.99  25.60 
1972 03 99.99 -99.99  26.10 
1972 04 99.99 -99.99  27.30 
1972 05 99.99 -99.99  28.10 
1972 06 99.99 -99.99  28.30 
1972 07 99.99 -99.99  27.90 
1972 08 99.99 -99.99  28.20 
1972 09 99.99 -99.99  28.30 
1972 10 99.99 -99.99  27.50 
1972 11 99.99 -99.99  27.70 
1972 12 99.99 -99.99  26.80 
1973 01 99.99 -99.99  26.00 
1973 02 99.99 -99.99  25.40 
1973 03 99.99 -99.99  27.40 
1973 04 99.99 -99.99  28.10 
1973 05 99.99 -99.99  28.20 
1973 06 99.99 -99.99  28.10 
1973 07 31.00 -99.99  28.50 
1973 08 31.10 -99.99  28.00 
1973 09 30.50 -99.99  28.10 
1973 10 30.50 -99.99  27.60 
1973 11 30.20 -99.99  27.60 
1973 12 28.20 -99.99  25.30 
1974 01 28.50 -99.99  25.90 
1974 02 28.10 -99.99  26.00 
1974 03 29.00 -99.99  26.40 
1974 04 99.99 -99.99  27.10 
1974 05 29.50 -99.99  27.40 
1974 06 30.20 -99.99  28.30 
1974 07 30.70 -99.99  28.20 
1974 08 31.50 -99.99  28.20 
1974 09 99.99 -99.99  27.70 
1974 10 29.80 -99.99  26.90 
1974 11 99.99 -99.99  26.70 
1974 12 28.40 -99.99  26.20 
1975 01 28.30 -99.99  26.10 
1975 02 99.99 -99.99  26.10 
1975 03 99.99 -99.99  26.30 
1975 04 99.99 -99.99  27.50 
1975 05 99.99 -99.99  28.20 
1975 06 99.99 -99.99  28.80 
1975 07 30.60 -99.99  28.10 
1975 08 30.50 -99.99  28.10 
1975 09 29.80 -99.99  27.50 
1975 10 99.99 -99.99  26.80 
1975 11 28.60 -99.99  26.30 
1975 12 28.00 -99.99  25.70 
1976 01 99.99 -99.99  25.20 
1976 02 99.99 -99.99  25.10 
1976 03 28.20 -99.99  26.00 
1976 04 29.10 -99.99  26.70 
1976 05 29.90 -99.99  27.70 
1976 06 99.99 -99.99  26.80 
1976 07 30.00 -99.99  27.70 
1976 08 30.90 -99.99  27.90 
1976 09 30.80 -99.99  28.10 
1976 10 31.00 -99.99  28.00 
1976 11 29.50 -99.99  26.70 
1976 12 29.20 -99.99  26.50 
1977 01 28.30 -99.99  25.70 
1977 02 99.99 -99.99  25.70 
1977 03 29.40 -99.99  27.60 
1977 04 30.10 -99.99  27.40 
1977 05 30.00 -99.99  27.30 
1977 06 30.00 -99.99  27.50 
1977 07 30.90 -99.99  28.30 
1977 08 30.90 -99.99  28.10 
1977 09 30.90 -99.99  28.30 
1977 10 99.99 -99.99  28.10 
1977 11 29.50 -99.99  27.20 
1977 12 29.10 -99.99  25.90 
1978 01 99.99 -99.99  25.70 
1978 02 27.60 -99.99  27.60 
1978 03 28.70 -99.99  26.50 
1978 04 29.70 -99.99  27.60 
1978 05 30.50 -99.99  28.30 
1978 06 30.60 -99.99  28.20 
1978 07 30.40 -99.99  27.70 
1978 08 30.80 -99.99  28.10 
1978 09 30.00 -99.99  27.80 
1978 10 30.40 -99.99  27.80 
1978 11 29.80 -99.99  27.30 
1978 12 29.20 -99.99  26.90 
1979 01 99.99 -99.99  26.50 
1979 02 28.40 -99.99  26.00 
1979 03 28.90 -99.99  26.80 
1979 04 29.80 -99.99  27.60 
1979 05 30.70 -99.99  28.50 
1979 06 31.40 -99.99  28.70 
1979 07 30.60 -99.99  28.10 
1979 08 31.40 -99.99  28.90 
1979 09 31.20 -99.99  28.20 
1979 10 30.10 -99.99  27.60 
1979 11 30.00 -99.99  27.30 
1979 12 29.00 -99.99  26.70 
1980 01 28.60 -99.99  26.30 
1980 02 28.20 -99.99 -99.99 
