1971 01 99.99 -99.99  -3.00 
1971 02 99.99 -99.99  -1.70 
1971 03 99.99 -99.99   1.00 
1971 04 99.99 -99.99   8.00 
1971 05 99.99 -99.99  12.60 
1971 06 99.99 -99.99  16.29 
1971 07 99.99 -99.99  20.80 
1971 08 99.99 -99.99  21.10 
1971 09 99.99 -99.99  16.60 
1971 10 99.99 -99.99  10.90 
1971 11 99.99 -99.99   6.40 
1971 12 99.99 -99.99  -1.30 
1972 01 99.99 -99.99  -1.20 
1972 02 99.99 -99.99  -2.20 
1972 03 99.99 -99.99   2.90 
1972 04 99.99 -99.99   8.00 
1972 05 99.99 -99.99  13.00 
1972 06 99.99 -99.99  17.90 
1972 07 99.99 -99.99  22.50 
1972 08 99.99 -99.99  20.70 
1972 09 99.99 -99.99  16.29 
1972 10 99.99 -99.99  11.00 
1972 11 99.99 -99.99   3.90 
1972 12 99.99 -99.99   -.50 
1973 01 99.99 -99.99  -1.30 
1973 02 99.99 -99.99  -1.20 
1973 03 99.99 -99.99   1.70 
1973 04 99.99 -99.99   8.60 
1973 05 99.99 -99.99  12.90 
1973 06 99.99 -99.99  16.90 
1973 07 99.99 -99.99  23.10 
1973 08 99.99 -99.99  23.80 
1973 09 99.99 -99.99  17.79 
1973 10 99.99 -99.99  10.80 
1973 11 99.99 -99.99   3.30 
1973 12 99.99 -99.99  -2.60 
1974 01 99.99 -99.99  -3.10 
1974 02 99.99 -99.99  -2.90 
1974 03 99.99 -99.99   1.30 
1974 04 99.99 -99.99   7.30 
1974 05 99.99 -99.99  12.60 
1974 06 99.99 -99.99  14.50 
1974 07 99.99 -99.99  17.50 
1974 08 99.99 -99.99  22.20 
1974 09 99.99 -99.99  17.70 
1974 10 99.99 -99.99  10.90 
1974 11 99.99 -99.99   3.90 
1974 12 99.99 -99.99  -1.60 
1975 01 99.99 -99.99  -3.10 
1975 02 99.99 -99.99  -2.80 
1975 03 99.99 -99.99   2.30 
1975 04 99.99 -99.99   8.50 
1975 05 99.99 -99.99  12.80 
1975 06 99.99 -99.99  17.20 
1975 07 99.99 -99.99  21.20 
1975 08 99.99 -99.99  23.60 
1975 09 99.99 -99.99  19.60 
1975 10 99.99 -99.99  12.60 
1975 11 99.99 -99.99   7.00 
1975 12 99.99 -99.99   -.30 
1976 01 99.99 -99.99  -4.30 
1976 02 99.99 -99.99    .10 
1976 03 99.99 -99.99   2.70 
1976 04 99.99 -99.99   8.50 
1976 05 99.99 -99.99  13.90 
1976 06 99.99 -99.99  17.40 
1976 07 99.99 -99.99  21.00 
1976 08 99.99 -99.99  20.90 
1976 09 99.99 -99.99  17.60 
1976 10 99.99 -99.99  12.20 
1976 11 99.99 -99.99   3.60 
1976 12 99.99 -99.99   -.90 
1977 01 99.99 -99.99  -6.50 
1977 02 99.99 -99.99  -3.50 
1977 03 99.99 -99.99   2.00 
1977 04 99.99 -99.99   8.10 
1977 05 99.99 -99.99  12.80 
1977 06 99.99 -99.99  15.60 
1977 07 99.99 -99.99  22.60 
1977 08 99.99 -99.99  21.30 
1977 09 99.99 -99.99  18.60 
1977 10 99.99 -99.99  14.40 
1977 11 99.99 -99.99   6.10 
1977 12 99.99 -99.99   2.00 
1978 01 99.99 -99.99  -2.90 
1978 02 99.99 -99.99  -3.80 
1978 03 99.99 -99.99   2.70 
1978 04 99.99 -99.99   9.20 
1978 05 99.99 -99.99  14.30 
1978 06 99.99 -99.99  19.10 
1978 07 99.99 -99.99  23.40 
1978 08 99.99 -99.99  23.80 
1978 09 99.99 -99.99  18.29 
1978 10 99.99 -99.99  11.70 
1978 11 99.99 -99.99   6.80 
1978 12 99.99 -99.99    .90 
1979 01 99.99 -99.99  -1.10 
1979 02 99.99 -99.99   -.20 
1979 03 99.99 -99.99   4.50 
1979 04 99.99 -99.99   8.30 
1979 05 99.99 -99.99  13.40 
1979 06 99.99 -99.99  18.50 
1979 07 99.99 -99.99  21.30 
1979 08 99.99 -99.99  22.80 
1979 09 99.99 -99.99  17.79 
1979 10 99.99 -99.99  13.20 
1979 11 99.99 -99.99   4.60 
1979 12 99.99 -99.99   1.10 
1980 01 99.99 -99.99  -3.80 
1980 02 99.99 -99.99  -3.10 
1980 03 99.99 -99.99   3.00 
1980 04 99.99 -99.99   6.90 
1980 05 99.99 -99.99  14.40 
1980 06 99.99 -99.99  17.90 
1980 07 99.99 -99.99  19.70 
1980 08 99.99 -99.99  20.10 
1980 09 99.99 -99.99  17.29 
1980 10 99.99 -99.99  11.40 
1980 11 99.99 -99.99   6.80 
1980 12 99.99 -99.99  -3.40 
