1975 05 99.99 -99.99  18.10 
1975 06 99.99 -99.99  21.80 
1975 07 99.99 -99.99  22.70 
1975 08 99.99 -99.99  22.40 
1975 09 99.99 -99.99  21.60 
1975 10 99.99 -99.99  13.50 
1975 11 99.99 -99.99   7.10 
1975 12 99.99 -99.99   2.50 
1976 01 99.99 -99.99   1.30 
1976 02 99.99 -99.99   3.40 
1976 03 99.99 -99.99   6.10 
1976 04 99.99 -99.99  12.60 
1976 05 99.99 -99.99  16.29 
1976 06 99.99 -99.99  19.29 
1976 07 99.99 -99.99  21.70 
1976 08 99.99 -99.99  19.29 
1976 09 99.99 -99.99  17.79 
1976 10 99.99 -99.99  15.30 
1976 11 99.99 -99.99   9.10 
1976 12 99.99 -99.99   3.20 
1977 01 99.99 -99.99   3.10 
1977 02 99.99 -99.99   8.50 
1977 03 99.99 -99.99   9.30 
1977 04 99.99 -99.99  11.80 
1977 05 99.99 -99.99  18.20 
1977 06 99.99 -99.99  20.60 
1977 07 99.99 -99.99  24.20 
1977 09 99.99 -99.99  18.29 
1977 10 99.99 -99.99  13.60 
1977 11 99.99 -99.99  10.10 
1977 12 99.99 -99.99    .20 
1978 01 99.99 -99.99   2.00 
1978 02 99.99 -99.99   5.90 
1978 03 99.99 -99.99   9.00 
1978 04 99.99 -99.99  11.70 
1978 05 99.99 -99.99  16.20 
1978 06 99.99 -99.99  21.40 
1978 07 99.99 -99.99  23.40 
1978 08 99.99 -99.99  22.50 
1978 09 99.99 -99.99  17.00 
1978 10 99.99 -99.99  12.60 
1978 11 99.99 -99.99   2.30 
1978 12 99.99 -99.99   5.60 
1979 01 99.99 -99.99   1.60 
1979 02 99.99 -99.99   5.50 
1979 03 99.99 -99.99  10.10 
1979 04 99.99 -99.99  10.70 
1979 05 99.99 -99.99  17.50 
1979 06 99.99 -99.99  22.80 
1979 07 99.99 -99.99  22.20 
1979 08 99.99 -99.99  21.70 
1979 09 99.99 -99.99  19.00 
1979 10 99.99 -99.99  13.00 
1979 11 99.99 -99.99   8.89 
1979 12 99.99 -99.99   4.69 
1980 01 99.99 -99.99  -1.70 
1980 02 99.99 -99.99   3.40 
1980 03 99.99 -99.99   7.60 
1980 04 99.99 -99.99  10.80 
1980 05 99.99 -99.99  14.70 
1980 06 99.99 -99.99  20.10 
1980 07 99.99 -99.99  23.40 
1980 08 99.99 -99.99  23.00 
1980 09 99.99 -99.99  18.70 
1980 10 99.99 -99.99  13.70 
1980 11 99.99 -99.99   9.70 
1980 12 99.99 -99.99   2.90 
1981 01 99.99 -99.99  -1.60 
1981 02 99.99 -99.99   2.70 
1981 03 99.99 -99.99  10.50 
1981 04 99.99 -99.99  12.10 
1981 05 99.99 -99.99  16.40 
1981 06 99.99 -99.99  23.10 
1981 07 99.99 -99.99  22.00 
1981 08 99.99 -99.99  22.20 
1981 09 99.99 -99.99  19.29 
1981 10 99.99 -99.99  15.00 
1981 11 99.99 -99.99   4.40 
1981 12 99.99 -99.99   4.60 
1982 02 99.99 -99.99   2.00 
1982 03 99.99 -99.99   6.90 
1982 04 99.99 -99.99  10.30 
1982 05 99.99 -99.99  17.20 
1982 06 99.99 -99.99  21.80 
1982 07 99.99 -99.99  22.50 
1982 08 99.99 -99.99  23.00 
1982 09 99.99 -99.99  22.10 
1982 10 99.99 -99.99  14.70 
1982 11 99.99 -99.99   5.30 
1982 12 99.99 -99.99   4.90 
1986 04 99.99 -99.99  14.80 
1987 05 99.99 -99.99  16.29 
1991 04 99.99 -99.99  11.30 
1991 05 99.99 -99.99  13.90 
1991 08 99.99 -99.99  22.50 
1991 09 99.99 -99.99  20.29 
1991 10 99.99 -99.99  15.30 
1991 11 99.99 -99.99   8.70 
1991 12 99.99 -99.99  -1.00 
1992 01 99.99 -99.99    .70 
1992 02 99.99 -99.99   2.90 
1992 03 99.99 -99.99   7.60 
1992 04 99.99 -99.99  12.50 
1992 05 99.99 -99.99  16.90 
1992 06 99.99 -99.99  21.20 
1992 07 99.99 -99.99  22.90 
1992 08 99.99 -99.99  26.40 
1992 09 99.99 -99.99  19.29 
1992 10 99.99 -99.99  15.70 
