1971 01 99.99 -99.99  -3.10 
1971 02 99.99 -99.99   2.60 
1971 03 99.99 -99.99  11.40 
1971 04 99.99 -99.99  14.80 
1971 05 99.99 -99.99  20.60 
1971 06 99.99 -99.99  26.40 
1971 07 99.99 -99.99  27.20 
1971 08 99.99 -99.99  24.50 
1971 09 99.99 -99.99  20.40 
1971 10 99.99 -99.99  15.00 
1971 11 99.99 -99.99  11.70 
1971 12 99.99 -99.99   7.40 
1972 01 99.99 -99.99  -4.40 
1972 02 99.99 -99.99  -6.90 
1972 03 99.99 -99.99   4.69 
1972 04 99.99 -99.99  15.50 
1972 05 99.99 -99.99  19.50 
1972 06 99.99 -99.99  24.50 
1972 07 99.99 -99.99  25.20 
1972 08 99.99 -99.99  23.50 
1972 09 99.99 -99.99  19.79 
1972 10 99.99 -99.99  14.40 
1972 11 99.99 -99.99  10.10 
1972 12 99.99 -99.99   -.30 
1973 01 99.99 -99.99  -2.90 
1973 02 99.99 -99.99   4.80 
1973 03 99.99 -99.99   7.20 
1973 04 99.99 -99.99  16.00 
1973 05 99.99 -99.99  20.10 
1973 06 99.99 -99.99  26.60 
1973 07 99.99 -99.99  28.30 
1973 08 99.99 -99.99  25.60 
1973 09 99.99 -99.99  18.10 
1973 10 99.99 -99.99  14.50 
1973 11 99.99 -99.99   9.80 
1973 12 99.99 -99.99   2.60 
1974 01 99.99 -99.99  -3.70 
1974 02 99.99 -99.99  -2.40 
1974 03 99.99 -99.99   8.30 
1974 04 99.99 -99.99  15.40 
1974 05 99.99 -99.99  21.50 
1974 06 99.99 -99.99  25.60 
1974 07 99.99 -99.99  28.40 
1974 08 99.99 -99.99  23.80 
1974 09 99.99 -99.99  20.50 
1974 10 99.99 -99.99  14.60 
1974 11 99.99 -99.99   9.00 
1974 12 99.99 -99.99    .50 
1975 01 99.99 -99.99   1.30 
1975 02 99.99 -99.99   1.40 
1975 03 99.99 -99.99   9.89 
1975 04 99.99 -99.99  16.70 
1975 05 99.99 -99.99  20.60 
1975 06 99.99 -99.99  26.50 
1975 07 99.99 -99.99  28.90 
1975 08 99.99 -99.99  26.00 
1975 09 99.99 -99.99  20.80 
1975 10 99.99 -99.99  13.10 
1975 11 99.99 -99.99   4.40 
1975 12 99.99 -99.99   3.10 
1976 01 99.99 -99.99   4.90 
1976 02 99.99 -99.99   1.30 
1976 03 99.99 -99.99   6.50 
1976 04 99.99 -99.99  15.40 
1976 05 99.99 -99.99  21.50 
1976 06 99.99 -99.99  25.40 
1976 07 99.99 -99.99  28.20 
1976 08 99.99 -99.99  26.50 
1976 09 99.99 -99.99  20.00 
1976 10 99.99 -99.99  11.60 
1976 11 99.99 -99.99   4.10 
1976 12 99.99 -99.99    .40 
1977 01 99.99 -99.99  -4.90 
1977 02 99.99 -99.99   3.00 
1977 03 99.99 -99.99  11.80 
1977 04 99.99 -99.99  17.79 
1977 05 99.99 -99.99  21.70 
1977 06 99.99 -99.99  27.30 
1977 07 99.99 -99.99  27.40 
1977 08 99.99 -99.99  25.40 
1977 09 99.99 -99.99  21.00 
1977 10 99.99 -99.99  13.00 
1977 11 99.99 -99.99  10.00 
1977 12 99.99 -99.99   2.60 
1978 01 99.99 -99.99   1.10 
1978 02 99.99 -99.99   -.20 
1978 03 99.99 -99.99   7.50 
1978 04 99.99 -99.99  16.50 
1978 05 99.99 -99.99  19.70 
1978 06 99.99 -99.99  25.30 
1978 07 99.99 -99.99  27.70 
1978 08 99.99 -99.99  24.30 
1978 09 99.99 -99.99  21.90 
1978 10 99.99 -99.99  14.80 
1978 11 99.99 -99.99   4.80 
1978 12 99.99 -99.99   7.10 
1979 01 99.99 -99.99    .10 
1979 02 99.99 -99.99   4.69 
1979 03 99.99 -99.99   8.20 
1979 04 99.99 -99.99  15.60 
1979 05 99.99 -99.99  17.20 
1979 06 99.99 -99.99  24.30 
1979 07 99.99 -99.99  27.70 
1979 08 99.99 -99.99  25.60 
1979 09 99.99 -99.99  20.00 
1979 10 99.99 -99.99  16.20 
1979 11 99.99 -99.99   6.40 
1979 12 99.99 -99.99   6.40 
1980 01 99.99 -99.99    .80 
1980 02 99.99 -99.99   -.20 
1980 03 99.99 -99.99   7.30 
1980 04 99.99 -99.99  17.50 
1980 05 99.99 -99.99  21.30 
1980 06 99.99 -99.99  25.50 
1980 07 99.99 -99.99  28.40 
1980 08 99.99 -99.99  25.40 
1980 09 99.99 -99.99  20.40 
1980 10 99.99 -99.99  13.50 
1980 11 99.99 -99.99  11.50 
1980 12 99.99 -99.99   5.40 
