1968 01 99.99 -99.99   -.40 
1968 02 99.99 -99.99  -3.00 
1968 03 99.99 -99.99  -7.50 
1968 04 99.99 -99.99 -10.00 
1968 05 99.99 -99.99 -14.40 
1968 06 99.99 -99.99 -13.50 
1968 07 99.99 -99.99 -10.20 
1968 08 99.99 -99.99 -11.20 
1968 09 99.99 -99.99  -9.80 
1968 10 99.99 -99.99  -2.80 
1968 11 99.99 -99.99  -2.60 
1968 12 99.99 -99.99   -.40 
1969 01 99.99 -99.99  -1.20 
1969 02 99.99 -99.99  -3.40 
1969 03 99.99 -99.99  -7.80 
1969 04 99.99 -99.99 -11.00 
1969 05 99.99 -99.99 -12.20 
1969 06 99.99 -99.99 -19.40 
1969 07 99.99 -99.99 -12.20 
1969 08 99.99 -99.99  -9.80 
1969 09 99.99 -99.99  -5.30 
1969 10 99.99 -99.99  -8.70 
1969 11 99.99 -99.99  -3.80 
1969 12 99.99 -99.99    .50 
1970 01 99.99 -99.99    .40 
1970 02 99.99 -99.99  -1.50 
1970 03 99.99 -99.99  -5.40 
1970 04 99.99 -99.99  -9.60 
1970 05 99.99 -99.99 -15.10 
1970 06 99.99 -99.99 -13.70 
1970 07 99.99 -99.99  -7.60 
1970 08 99.99 -99.99 -11.60 
1970 09 99.99 -99.99 -12.10 
1970 10 99.99 -99.99  -2.90 
1970 11 99.99 -99.99  -1.30 
1970 12 99.99 -99.99  -1.00 
1971 01 99.99 -99.99   -.50 
1971 02 99.99 -99.99  -3.10 
1971 03 99.99 -99.99  -4.60 
1971 04 99.99 -99.99  -9.00 
1971 05 99.99 -99.99 -15.50 
1971 06 99.99 -99.99  -7.80 
1971 07 99.99 -99.99 -10.40 
1971 08 99.99 -99.99 -11.80 
1971 09 99.99 -99.99 -12.00 
1971 10 99.99 -99.99  -4.00 
1971 11 99.99 -99.99  -1.40 
1971 12 99.99 -99.99  -1.10 
1972 01 99.99 -99.99   -.60 
1972 02 99.99 -99.99  -1.60 
1972 03 99.99 -99.99  -8.39 
1972 04 99.99 -99.99 -14.40 
1972 05 99.99 -99.99  -9.50 
1972 06 99.99 -99.99 -15.70 
1972 07 99.99 -99.99 -11.30 
1972 08 99.99 -99.99 -12.50 
1972 09 99.99 -99.99 -10.40 
1972 10 99.99 -99.99  -4.10 
1972 11 99.99 -99.99  -2.09 
1972 12 99.99 -99.99   1.50 
1973 01 99.99 -99.99  -1.90 
1973 02 99.99 -99.99   -.60 
1973 03 99.99 -99.99  -2.30 
1973 04 99.99 -99.99  -9.60 
1973 05 99.99 -99.99 -15.70 
1973 06 99.99 -99.99 -16.40 
1973 07 99.99 -99.99  -8.80 
1973 08 99.99 -99.99 -11.00 
1973 09 99.99 -99.99 -14.10 
1973 10 99.99 -99.99  -4.10 
1973 11 99.99 -99.99  -1.20 
1973 12 99.99 -99.99    .50 
1974 01 99.99 -99.99  -1.50 
1974 02 99.99 -99.99   1.00 
1974 03 99.99 -99.99  -1.20 
1974 04 99.99 -99.99 -11.10 
1974 05 99.99 -99.99 -11.70 
1974 06 99.99 -99.99 -12.00 
1974 07 99.99 -99.99 -12.80 
1974 08 99.99 -99.99 -15.00 
1974 09 99.99 -99.99  -9.30 
1974 10 99.99 -99.99  -4.60 
1974 11 99.99 -99.99  -2.20 
1974 12 99.99 -99.99    .30 
1975 01 99.99 -99.99    .60 
1975 02 99.99 -99.99   -.80 
1975 03 99.99 -99.99  -5.60 
1975 04 99.99 -99.99  -8.70 
1975 05 99.99 -99.99 -14.20 
1975 06 99.99 -99.99 -14.80 
1975 07 99.99 -99.99 -17.20 
1975 08 99.99 -99.99 -17.00 
1975 09 99.99 -99.99  -9.89 
1975 10 99.99 -99.99  -1.30 
1975 11 99.99 -99.99  -1.60 
1975 12 99.99 -99.99   -.20 
1976 01 99.99 -99.99   -.60 
1976 02 99.99 -99.99    .10 
1976 03 99.99 -99.99  -3.80 
1976 04 99.99 -99.99  -6.70 
1976 05 99.99 -99.99  -7.30 
1976 06 99.99 -99.99 -10.30 
1976 07 99.99 -99.99 -19.60 
1976 08 99.99 -99.99 -12.30 
1976 09 99.99 -99.99  -9.60 
1976 10 99.99 -99.99  -1.20 
1976 11 99.99 -99.99   -.50 
1976 12 99.99 -99.99   -.20 
1977 01 99.99 -99.99    .40 
1977 02 99.99 -99.99    .30 
1977 03 99.99 -99.99  -2.70 
1977 04 99.99 -99.99  -7.00 
1977 05 99.99 -99.99  -6.70 
1977 06 99.99 -99.99  -9.30 
1977 07 99.99 -99.99 -11.00 
1977 08 99.99 -99.99 -12.90 
1977 09 99.99 -99.99  -9.20 
1977 10 99.99 -99.99  -3.30 
1977 11 99.99 -99.99  -1.40 
1977 12 99.99 -99.99    .80 
