1985 04 99.99 -99.99  20.90 
1985 05 99.99 -99.99  17.29 
1985 06 99.99 -99.99  14.70 
1985 07 99.99 -99.99  13.90 
1985 08 99.99 -99.99  18.10 
1985 11 99.99 -99.99  26.50 
1985 12 99.99 -99.99  25.50 
1986 01 99.99 -99.99  27.10 
1986 02 99.99 -99.99  25.60 
1986 03 99.99 -99.99  24.90 
1986 05 99.99 -99.99  18.70 
1986 06 99.99 -99.99  14.20 
1986 07 99.99 -99.99  14.40 
1986 08 99.99 -99.99  18.10 
1986 09 99.99 -99.99  21.00 
1986 12 99.99 -99.99  25.60 
1987 01 99.99 -99.99  27.00 
1987 02 99.99 -99.99  28.40 
1987 03 99.99 -99.99  24.80 
1987 04 99.99 -99.99  23.80 
1987 05 99.99 -99.99  19.40 
1987 06 99.99 -99.99  13.40 
1987 07 99.99 -99.99  13.10 
1987 08 99.99 -99.99  16.20 
1987 09 99.99 -99.99  20.40 
1987 12 99.99 -99.99  25.60 
1988 01 99.99 -99.99  27.30 
1988 02 99.99 -99.99  24.50 
1988 03 99.99 -99.99  23.60 
1988 04 99.99 -99.99  19.20 
1988 06 99.99 -99.99  12.10 
1988 07 99.99 -99.99  13.20 
1988 08 99.99 -99.99  17.10 
1988 09 99.99 -99.99  19.79 
1988 10 99.99 -99.99  22.10 
1988 11 99.99 -99.99  23.30 
1988 12 99.99 -99.99  23.40 
1989 01 99.99 -99.99  23.90 
1989 02 99.99 -99.99  19.00 
1989 03 99.99 -99.99  22.80 
1989 04 99.99 -99.99  18.70 
1989 05 99.99 -99.99  16.79 
1989 07 99.99 -99.99  13.00 
1989 08 99.99 -99.99  18.10 
1989 11 99.99 -99.99  26.20 
1990 01 99.99 -99.99  25.40 
1990 02 99.99 -99.99  23.40 
1990 03 99.99 -99.99  23.40 
1990 04 99.99 -99.99  20.80 
1990 06 99.99 -99.99  13.70 
1990 07 99.99 -99.99  14.70 
1990 08 99.99 -99.99  16.50 
1990 09 99.99 -99.99  20.50 
1990 10 99.99 -99.99  23.90 
1990 11 99.99 -99.99  26.60 
