1951 01 99.99 -99.99  13.80 
1951 02 99.99 -99.99  14.30 
1951 03 99.99 -99.99  16.00 
1951 04 99.99 -99.99  17.70 
1951 05 99.99 -99.99  20.60 
1951 06 99.99 -99.99  23.10 
1951 07 99.99 -99.99  25.40 
1951 08 99.99 -99.99  25.80 
1951 09 99.99 -99.99  24.90 
1951 10 99.99 -99.99  22.90 
1951 11 99.99 -99.99  17.70 
1951 12 99.99 -99.99  13.70 
1952 01 99.99 -99.99  12.70 
1952 02 99.99 -99.99  13.30 
1952 03 99.99 -99.99  15.80 
1952 04 99.99 -99.99  18.40 
1952 05 99.99 -99.99  20.00 
1952 06 99.99 -99.99  22.60 
1952 07 99.99 -99.99  24.90 
1952 08 99.99 -99.99  26.00 
1952 09 99.99 -99.99  25.80 
1952 10 99.99 -99.99  23.00 
1952 11 99.99 -99.99  18.50 
1952 12 99.99 -99.99  14.80 
1953 01 99.99 -99.99  12.00 
1953 02 99.99 -99.99  14.40 
1953 03 99.99 -99.99  13.50 
1953 04 99.99 -99.99  17.50 
1953 05 99.99 -99.99  20.50 
1953 06 99.99 -99.99  23.40 
1953 07 99.99 -99.99  25.40 
1953 08 99.99 -99.99  25.60 
1953 09 99.99 -99.99  23.60 
1953 10 99.99 -99.99  22.30 
1953 11 99.99 -99.99  17.60 
1953 12 99.99 -99.99  14.40 
1954 01 99.99 -99.99  12.40 
1954 02 99.99 -99.99  13.60 
1954 03 99.99 -99.99  14.90 
1954 04 99.99 -99.99  16.50 
1954 05 99.99 -99.99  19.40 
1954 06 99.99 -99.99  23.20 
1954 07 99.99 -99.99  25.20 
1954 08 99.99 -99.99  25.80 
1954 09 99.99 -99.99  24.30 
1954 10 99.99 -99.99  21.70 
1954 11 99.99 -99.99  18.29 
1954 12 99.99 -99.99  14.40 
1955 01 99.99 -99.99  14.40 
1955 02 99.99 -99.99  16.20 
1955 03 99.99 -99.99  16.00 
1955 04 99.99 -99.99  17.60 
1955 05 99.99 -99.99  20.10 
1955 06 99.99 -99.99  24.40 
1955 07 99.99 -99.99  25.50 
1955 08 99.99 -99.99  25.80 
1955 09 99.99 -99.99  24.90 
1955 10 99.99 -99.99  23.30 
1955 11 99.99 -99.99  19.70 
1955 12 99.99 -99.99  15.20 
1956 01 99.99 -99.99  13.70 
1956 02 99.99 -99.99  14.30 
1956 03 99.99 -99.99  14.40 
1956 04 99.99 -99.99  17.60 
1956 05 99.99 -99.99  19.40 
1956 06 99.99 -99.99  23.40 
1956 07 99.99 -99.99  25.30 
1956 08 99.99 -99.99  26.00 
1956 09 99.99 -99.99  24.60 
1956 10 99.99 -99.99  21.00 
1956 11 99.99 -99.99  18.29 
1956 12 99.99 -99.99  13.80 
1957 01 99.99 -99.99  12.30 
1957 02 99.99 -99.99  13.80 
1957 03 99.99 -99.99  14.40 
1957 04 99.99 -99.99  17.50 
1957 05 99.99 -99.99  19.79 
1957 06 99.99 -99.99  23.00 
1957 07 99.99 -99.99  24.50 
1957 08 99.99 -99.99  25.80 
1957 09 99.99 -99.99  24.80 
1957 10 99.99 -99.99  22.40 
1957 11 99.99 -99.99  19.60 
1957 12 99.99 -99.99  14.40 
1958 01 99.99 -99.99  13.40 
1958 02 99.99 -99.99  14.90 
1958 03 99.99 -99.99  17.10 
1958 04 99.99 -99.99  17.29 
1958 05 99.99 -99.99  19.50 
1958 06 99.99 -99.99  23.10 
1958 07 99.99 -99.99  25.20 
1958 08 99.99 -99.99  25.80 
1958 09 99.99 -99.99  25.30 
1958 10 99.99 -99.99  21.80 
1958 11 99.99 -99.99  19.50 
1958 12 99.99 -99.99  15.40 
1959 01 99.99 -99.99  13.10 
1959 02 99.99 -99.99  12.50 
1959 03 99.99 -99.99  14.90 
1959 04 99.99 -99.99  17.70 
1959 05 99.99 -99.99  20.10 
1959 06 99.99 -99.99  22.90 
1959 07 99.99 -99.99  25.00 
1959 08 99.99 -99.99  25.60 
1959 09 99.99 -99.99  25.80 
1959 10 99.99 -99.99  20.70 
1959 11 99.99 -99.99  18.00 
1959 12 99.99 -99.99  14.00 
1960 01 99.99 -99.99  13.20 
1960 02 99.99 -99.99  14.20 
1960 03 99.99 -99.99  15.80 
1960 04 99.99 -99.99  18.20 
1960 05 99.99 -99.99  19.90 
1960 06 99.99 -99.99  23.10 
1960 07 99.99 -99.99  24.80 
1960 08 99.99 -99.99  25.00 
1960 09 99.99 -99.99  23.90 
1960 10 99.99 -99.99  22.50 
1960 11 99.99 -99.99  19.29 
1960 12 99.99 -99.99  16.10 
1961 01 99.99 -99.99  12.80 
1961 02 99.99 -99.99  12.80 
1961 03 99.99 -99.99  12.80 
1962 01 99.99 -99.99  13.70 
1966 07 99.99 -99.99  25.10 
1966 08 99.99 -99.99  26.50 
1966 09 99.99 -99.99  24.10 
1966 10 99.99 -99.99  23.40 
1966 11 99.99 -99.99  20.10 
1966 12 99.99 -99.99  14.10 
1967 01 99.99 -99.99  12.60 
1967 02 99.99 -99.99  13.30 
1967 03 99.99 -99.99  14.10 
1967 04 99.99 -99.99  17.60 
1967 05 99.99 -99.99  20.10 
1967 06 99.99 -99.99  23.50 
1967 07 99.99 -99.99  24.90 
1967 08 99.99 -99.99  25.80 
1967 09 99.99 -99.99  24.70 
1967 10 99.99 -99.99  21.40 
1967 11 99.99 -99.99  18.70 
1967 12 99.99 -99.99  15.50 
1968 01 99.99 -99.99  12.10 
1968 02 99.99 -99.99  14.20 
1968 03 99.99 -99.99  14.30 
1968 04 99.99 -99.99  17.79 
1968 05 99.99 -99.99  20.70 
1968 06 99.99 -99.99  25.60 
1968 07 99.99 -99.99  25.00 
1968 08 99.99 -99.99  26.00 
1968 09 99.99 -99.99  23.90 
1968 10 99.99 -99.99  20.60 
1968 11 99.99 -99.99  17.70 
1969 01 99.99 -99.99  12.10 
1969 02 99.99 -99.99  14.60 
1969 03 99.99 -99.99  16.79 
1969 04 99.99 -99.99  16.20 
1969 05 99.99 -99.99  20.00 
1969 06 99.99 -99.99  25.00 
1969 07 99.99 -99.99  24.70 
1969 08 99.99 -99.99  25.50 
1969 09 99.99 -99.99  23.00 
1969 10 99.99 -99.99  21.90 
1969 11 99.99 -99.99  18.29 
1969 12 99.99 -99.99  14.20 
1970 01 99.99 -99.99  14.40 
1970 02 99.99 -99.99  14.80 
1970 03 99.99 -99.99  17.10 
