1952 05 99.99 -99.99  32.09 
1952 06 99.99 -99.99  31.50 
1952 07 99.99 -99.99  24.70 
1952 08 99.99 -99.99  27.50 
1952 09 99.99 -99.99  29.50 
1952 10 99.99 -99.99  30.50 
1952 11 99.99 -99.99  28.60 
1952 12 99.99 -99.99  26.30 
1953 01 99.99 -99.99  26.80 
1953 02 99.99 -99.99  27.60 
1953 04 99.99 -99.99  27.50 
1953 05 99.99 -99.99  30.30 
1953 06 99.99 -99.99  31.70 
1953 07 99.99 -99.99  26.90 
1953 08 99.99 -99.99  26.80 
1953 09 99.99 -99.99  34.40 
1953 10 99.99 -99.99  29.90 
1953 11 99.99 -99.99  27.90 
1953 12 99.99 -99.99  28.00 
1954 09 99.99 -99.99  26.60 
1954 10 99.99 -99.99  28.60 
1954 11 99.99 -99.99  26.50 
1954 12 99.99 -99.99  25.20 
1955 01 99.99 -99.99  22.10 
1955 02 99.99 -99.99  25.60 
1955 05 99.99 -99.99  32.09 
1955 06 99.99 -99.99  32.30 
1955 07 99.99 -99.99  29.90 
1955 08 99.99 -99.99  25.40 
1955 09 99.99 -99.99  26.30 
1955 10 99.99 -99.99  28.30 
1955 11 99.99 -99.99  26.70 
1955 12 99.99 -99.99  25.40 
1956 01 99.99 -99.99  23.80 
1956 02 99.99 -99.99  26.20 
1956 03 99.99 -99.99  29.70 
1956 04 99.99 -99.99  27.50 
1956 05 99.99 -99.99  31.30 
1956 06 99.99 -99.99  29.60 
1956 07 99.99 -99.99  26.10 
1956 08 99.99 -99.99  25.60 
1956 09 99.99 -99.99  27.10 
1956 10 99.99 -99.99  27.20 
1956 11 99.99 -99.99  25.20 
1956 12 99.99 -99.99  24.70 
1957 01 99.99 -99.99  25.50 
1957 02 99.99 -99.99  24.90 
1957 03 99.99 -99.99  23.80 
1957 04 99.99 -99.99  27.00 
1957 05 99.99 -99.99  27.40 
1957 06 99.99 -99.99  21.30 
1957 07 99.99 -99.99  26.60 
1957 08 99.99 -99.99  27.60 
1957 09 99.99 -99.99  26.70 
1957 10 99.99 -99.99  29.60 
1957 11 99.99 -99.99  25.40 
1957 12 99.99 -99.99  26.70 
1958 01 99.99 -99.99  23.30 
1958 02 99.99 -99.99  23.20 
1958 03 99.99 -99.99  26.40 
1958 04 99.99 -99.99  27.30 
1958 05 99.99 -99.99  29.00 
1958 06 99.99 -99.99  27.90 
1958 07 99.99 -99.99  25.40 
1958 08 99.99 -99.99  24.50 
1958 09 99.99 -99.99  25.70 
1958 10 99.99 -99.99  25.70 
1958 12 99.99 -99.99  23.20 
1959 01 99.99 -99.99  23.00 
1959 02 99.99 -99.99  25.00 
1959 03 99.99 -99.99  26.20 
1959 04 99.99 -99.99  28.70 
1959 05 99.99 -99.99  29.30 
1959 06 99.99 -99.99  29.60 
1959 07 99.99 -99.99  26.10 
1959 08 99.99 -99.99  24.00 
1959 10 99.99 -99.99  25.90 
1959 11 99.99 -99.99  24.50 
1959 12 99.99 -99.99  21.50 
1960 01 99.99 -99.99  22.80 
1960 02 99.99 -99.99  24.40 
1960 03 99.99 -99.99  25.70 
1960 04 99.99 -99.99  27.60 
1960 05 99.99 -99.99  27.90 
1960 06 99.99 -99.99  28.70 
1960 07 99.99 -99.99  25.60 
1960 08 99.99 -99.99  25.10 
1960 09 99.99 -99.99  25.30 
1960 10 99.99 -99.99  25.80 
1960 11 99.99 -99.99  24.50 
1960 12 99.99 -99.99  23.90 
1967 07 99.99 -99.99  26.10 
1967 10 99.99 -99.99  26.70 
1968 02 99.99 -99.99  22.90 
1968 08 99.99 -99.99  26.20 
1968 11 99.99 -99.99  24.30 
1970 12 99.99 -99.99  23.20 
1971 01 99.99 -99.99  23.60 
1971 05 99.99 -99.99  28.50 
1971 06 99.99 -99.99  30.00 
1972 01 99.99 -99.99  24.40 
1972 09 99.99 -99.99  28.10 
1973 03 99.99 -99.99  29.60 
1973 06 99.99 -99.99  30.20 
1973 11 99.99 -99.99  25.80 
1973 12 99.99 -99.99  23.20 
1974 02 99.99 -99.99  25.40 
1974 08 99.99 -99.99  26.80 
1974 09 99.99 -99.99  26.90 
1974 10 99.99 -99.99  27.60 
1974 11 99.99 -99.99  24.30 
1974 12 99.99 -99.99  23.60 
