1967 01 99.99 -99.99  25.20 
1967 02 99.99 -99.99  26.50 
1967 03 99.99 -99.99  24.40 
1967 04 99.99 -99.99  22.80 
1967 05 99.99 -99.99  22.20 
1967 06 99.99 -99.99  14.00 
1967 07 99.99 -99.99  20.50 
1967 08 99.99 -99.99  19.40 
1967 09 99.99 -99.99  20.70 
1967 10 99.99 -99.99  24.00 
1967 11 99.99 -99.99  24.40 
1968 05 99.99 -99.99  16.90 
1968 07 99.99 -99.99  17.90 
1968 09 99.99 -99.99  23.90 
1968 10 99.99 -99.99  23.30 
1968 11 99.99 -99.99  26.00 
1968 12 99.99 -99.99  27.00 
1969 01 99.99 -99.99  28.70 
1969 03 99.99 -99.99  25.40 
1969 04 99.99 -99.99  23.40 
1970 05 99.99 -99.99  19.29 
1970 06 99.99 -99.99  16.20 
1970 07 99.99 -99.99  15.60 
1970 10 99.99 -99.99  21.40 
1971 02 99.99 -99.99  25.40 
1971 06 99.99 -99.99  13.30 
1971 09 99.99 -99.99  20.60 
1971 11 99.99 -99.99  23.00 
1971 12 99.99 -99.99  26.20 
1972 01 99.99 -99.99  26.00 
1972 02 99.99 -99.99  27.20 
1972 03 99.99 -99.99  21.20 
1972 04 99.99 -99.99  20.20 
1972 05 99.99 -99.99  20.80 
1972 06 99.99 -99.99  19.90 
1972 07 99.99 -99.99  15.60 
1972 08 99.99 -99.99  15.30 
1972 09 99.99 -99.99  20.00 
1972 10 99.99 -99.99  19.40 
1972 11 99.99 -99.99  22.70 
1972 12 99.99 -99.99  24.60 
1973 01 99.99 -99.99  26.30 
1973 02 99.99 -99.99  26.50 
1973 03 99.99 -99.99  24.50 
1973 05 99.99 -99.99  18.10 
1973 06 99.99 -99.99  16.70 
1973 07 99.99 -99.99  15.10 
1973 08 99.99 -99.99  14.30 
1973 09 99.99 -99.99  17.70 
1973 10 99.99 -99.99  21.20 
1973 11 99.99 -99.99  22.20 
1973 12 99.99 -99.99  24.60 
1974 01 99.99 -99.99  26.80 
1974 02 99.99 -99.99  25.50 
1974 03 99.99 -99.99  24.00 
1974 04 99.99 -99.99  20.90 
1974 05 99.99 -99.99  19.40 
1974 06 99.99 -99.99  14.30 
1974 07 99.99 -99.99  17.40 
1974 08 99.99 -99.99  16.20 
1974 09 99.99 -99.99  18.50 
1974 10 99.99 -99.99  20.10 
1974 11 99.99 -99.99  22.30 
1974 12 99.99 -99.99  24.60 
1975 04 99.99 -99.99  20.90 
1975 05 99.99 -99.99  17.00 
1975 06 99.99 -99.99  17.00 
1975 08 99.99 -99.99  16.50 
1975 09 99.99 -99.99  17.10 
1975 10 99.99 -99.99  20.20 
1975 11 99.99 -99.99  22.50 
1975 12 99.99 -99.99  25.30 
1976 01 99.99 -99.99  26.30 
1976 03 99.99 -99.99  22.70 
1976 04 99.99 -99.99  19.90 
1976 05 99.99 -99.99  16.70 
1976 06 99.99 -99.99  14.70 
1976 07 99.99 -99.99  15.70 
1976 08 99.99 -99.99  16.29 
1976 09 99.99 -99.99  17.60 
1976 10 99.99 -99.99  15.70 
1976 11 99.99 -99.99  23.50 
1977 01 99.99 -99.99  25.80 
1977 02 99.99 -99.99  27.00 
1977 03 99.99 -99.99  25.70 
1977 05 99.99 -99.99  18.20 
1977 06 99.99 -99.99  17.40 
1977 07 99.99 -99.99  19.00 
1977 08 99.99 -99.99  16.40 
1977 11 99.99 -99.99  23.80 
1977 12 99.99 -99.99  26.20 
1978 01 99.99 -99.99  27.10 
1978 02 99.99 -99.99  25.30 
1978 03 99.99 -99.99  25.80 
1978 04 99.99 -99.99  20.80 
1978 06 99.99 -99.99  16.20 
1978 07 99.99 -99.99  17.60 
1978 08 99.99 -99.99  15.70 
1978 10 99.99 -99.99  22.50 
1979 02 99.99 -99.99  26.00 
1979 03 99.99 -99.99  23.70 
1979 05 99.99 -99.99  16.29 
1979 07 99.99 -99.99  15.70 
1979 08 99.99 -99.99  19.00 
1979 11 99.99 -99.99  22.70 
1980 02 99.99 -99.99  25.60 
1980 05 99.99 -99.99  19.90 
1980 06 99.99 -99.99  15.20 
1980 07 99.99 -99.99  17.40 
1980 08 99.99 -99.99  17.79 
1980 09 99.99 -99.99  15.60 
1980 10 99.99 -99.99  21.00 
1981 02 99.99 -99.99  27.00 
1981 03 99.99 -99.99  22.60 
1981 04 99.99 -99.99  21.60 
1981 06 99.99 -99.99  14.40 
1981 07 99.99 -99.99  12.20 
1981 09 99.99 -99.99  17.60 
1982 03 99.99 -99.99  24.40 
1982 04 99.99 -99.99  22.20 
1982 05 99.99 -99.99  18.79 
1982 06 99.99 -99.99  16.40 
1982 08 99.99 -99.99  18.79 
1982 09 99.99 -99.99  20.40 
1982 11 99.99 -99.99  22.60 
1983 02 99.99 -99.99  28.20 
1983 03 99.99 -99.99  24.20 
1983 04 99.99 -99.99  21.40 
1983 05 99.99 -99.99  19.60 
1983 06 99.99 -99.99  14.20 
1983 08 99.99 -99.99  16.79 
1983 09 99.99 -99.99  16.40 
1983 10 99.99 -99.99  16.79 
1984 02 99.99 -99.99  27.80 
1984 04 99.99 -99.99  20.00 
1984 06 99.99 -99.99  12.60 
1984 07 99.99 -99.99  16.20 
1984 08 99.99 -99.99  14.20 
1984 09 99.99 -99.99  17.60 
