1975 05 99.99 -99.99  14.80 
1975 06 99.99 -99.99  17.00 
1975 07 99.99 -99.99  18.40 
1975 08 99.99 -99.99  17.10 
1975 10 99.99 -99.99  10.10 
1975 11 99.99 -99.99   4.40 
1975 12 99.99 -99.99   1.50 
1976 01 99.99 -99.99  -1.50 
1976 02 99.99 -99.99    .20 
1976 03 99.99 -99.99   1.90 
1976 04 99.99 -99.99   7.80 
1976 05 99.99 -99.99  12.90 
1976 06 99.99 -99.99  15.60 
1976 07 99.99 -99.99  18.10 
1976 08 99.99 -99.99  15.10 
1976 09 99.99 -99.99  13.30 
1976 10 99.99 -99.99  11.90 
1976 11 99.99 -99.99   5.70 
1976 12 99.99 -99.99   1.00 
1977 01 99.99 -99.99   2.80 
1977 03 99.99 -99.99   8.00 
1977 04 99.99 -99.99   8.60 
1977 05 99.99 -99.99  13.70 
1977 06 99.99 -99.99  15.50 
1977 09 99.99 -99.99  12.60 
1977 10 99.99 -99.99  11.00 
1977 11 99.99 -99.99   6.10 
1977 12 99.99 -99.99  -1.60 
1978 01 99.99 -99.99   -.20 
1978 02 99.99 -99.99   1.50 
1978 03 99.99 -99.99   5.70 
1978 04 99.99 -99.99   8.20 
1978 05 99.99 -99.99  11.80 
1978 06 99.99 -99.99  16.60 
1978 07 99.99 -99.99  17.10 
1978 08 99.99 -99.99  17.20 
1978 09 99.99 -99.99  13.00 
1978 10 99.99 -99.99   9.39 
1978 11 99.99 -99.99   1.70 
1978 12 99.99 -99.99    .30 
1979 01 99.99 -99.99   -.60 
1979 02 99.99 -99.99   3.20 
1979 03 99.99 -99.99   7.00 
1979 04 99.99 -99.99   7.60 
1979 05 99.99 -99.99  13.00 
1979 06 99.99 -99.99  18.20 
1979 07 99.99 -99.99  17.00 
1979 10 99.99 -99.99  10.00 
1979 11 99.99 -99.99   4.90 
1979 12 99.99 -99.99   4.40 
1980 01 99.99 -99.99  -2.30 
1980 02 99.99 -99.99   2.70 
1980 03 99.99 -99.99   4.40 
1980 04 99.99 -99.99   6.20 
1980 05 99.99 -99.99  10.90 
1980 06 99.99 -99.99  16.60 
1980 07 99.99 -99.99  17.90 
1980 12 99.99 -99.99  -2.40 
1981 01 99.99 -99.99  -4.80 
1981 03 99.99 -99.99   7.80 
1981 04 99.99 -99.99   9.50 
1981 06 99.99 -99.99  17.10 
1981 07 99.99 -99.99  17.40 
1981 08 99.99 -99.99  18.20 
1981 09 99.99 -99.99  15.80 
1981 10 99.99 -99.99  12.50 
1981 11 99.99 -99.99   2.60 
1981 12 99.99 -99.99   1.40 
1982 03 99.99 -99.99   3.80 
1982 04 99.99 -99.99   7.50 
1982 05 99.99 -99.99  14.90 
1982 06 99.99 -99.99  18.29 
1982 07 99.99 -99.99  19.00 
1982 09 99.99 -99.99  17.79 
1982 10 99.99 -99.99  11.60 
1986 04 99.99 -99.99  10.30 
1986 10 99.99 -99.99  10.20 
1987 05 99.99 -99.99  12.00 
1987 08 99.99 -99.99  18.70 
1991 03 99.99 -99.99   7.60 
1991 04 99.99 -99.99   6.60 
1991 05 99.99 -99.99  10.50 
1991 06 99.99 -99.99  17.90 
1991 07 99.99 -99.99  19.90 
1991 08 99.99 -99.99  18.50 
1991 09 99.99 -99.99  16.20 
1991 10 99.99 -99.99  10.10 
1991 11 99.99 -99.99   6.20 
1991 12 99.99 -99.99  -2.60 
1992 01 99.99 -99.99  -1.30 
1992 02 99.99 -99.99   1.40 
1992 03 99.99 -99.99   5.60 
