1983 01 31.20  16.00  23.60 
1983 02 34.90  16.29  25.60 
1983 03 37.50  19.40  28.45 
1983 04 39.30  23.50  31.40 
1983 05 36.90  24.60  30.75 
1983 06 32.40  24.10  28.25 
1983 07 31.10  24.00  27.55 
1983 08 30.20  23.70  26.95 
1983 09 31.50  23.90  27.70 
1983 10 30.50  23.40  26.95 
1983 11 29.60  19.40  24.50 
1983 12 30.20  16.20  23.20 
1984 01 31.40  16.70  24.05 
1984 02 34.59  21.20  27.90 
1984 03 35.70  20.60  28.15 
1984 04 35.59  23.80  29.70 
1984 05 33.50  23.70  28.60 
1984 06 29.50  23.60  26.55 
1984 07 30.00  23.20  26.60 
1984 08 29.00  23.20  26.10 
1984 09 31.00  23.00  27.00 
1984 10 30.80  22.20  26.50 
1984 11 31.20  19.70  25.45 
1984 12 31.40  17.40  24.40 
1985 01 33.00  18.70  25.85 
1985 02 34.90  19.00  26.95 
1985 03 36.50  21.40  28.95 
1985 04 36.09  23.90  30.00 
1985 05 34.20  24.10  29.15 
1985 06 28.80  23.40  26.09 
1985 07 29.20  22.60  25.90 
1985 08 29.10  23.00  26.05 
1985 09 30.40  22.80  26.59 
1985 10 31.20  22.10  26.65 
1985 11 31.10  20.60  25.85 
1985 12 30.40  16.10  23.25 
1986 01 30.80  14.60  22.70 
1986 02 34.20  18.00  26.10 
1986 03 35.40  19.40  27.40 
1986 04 35.70  23.20  29.45 
1986 05 31.30  23.50  27.40 
1986 06 30.30  23.70  27.00 
1986 07 29.30  23.20  26.25 
1986 08 29.20  23.30  26.25 
1986 09 31.30  22.80  27.05 
1986 10 31.70  22.90  27.30 
1986 11 30.90  19.79  25.34 
1986 12 30.90  17.00  23.95 
1987 01 32.20  15.70  23.95 
1987 02 34.30  16.79  25.55 
1987 03 35.09  20.29  27.70 
1987 04 36.20  21.90  29.05 
1987 05 34.50  22.60  28.55 
1987 06 31.40  22.70  27.05 
1987 07 30.70  22.00  26.35 
1987 08 30.60  21.70  26.15 
1987 09 31.20  23.00  27.10 
1987 10 32.50  23.10  27.80 
1987 11 31.20  23.40  27.30 
1987 12 29.30  14.50  21.90 
1988 01 33.09  16.40  24.75 
1988 02 35.00  20.90  27.95 
1988 03 36.80  21.70  29.25 
1988 04 36.59  23.90  30.25 
1988 05 32.50  24.30  28.40 
1988 06 29.80  23.20  26.50 
1988 07 30.90  23.40  27.15 
1988 08 30.60  23.60  27.10 
1988 09 32.40  23.40  27.90 
1988 10 30.20  22.70  26.45 
1988 11 29.80  18.90  24.34 
1988 12 30.40  14.70  22.55 
1989 01 33.30  18.50  25.90 
1989 02 33.90  18.00  25.95 
1989 03 34.40  20.10  27.25 
1989 04 36.80  23.30  30.05 
1989 05 33.59  23.70  28.65 
1989 06 29.80  23.50  26.65 
1989 07 30.90  23.20  27.05 
1989 08 29.90  22.70  26.30 
1989 09 31.00  22.70  26.85 
1989 10 31.90  22.10  27.00 
1989 11 31.80  18.90  25.34 
1989 12 31.30  14.00  22.65 
1990 01 33.50  17.70  25.60 
1990 02 35.30  18.29  26.80 
1990 03 35.90  19.50  27.70 
1990 04 36.30  21.30  28.80 
1990 05 33.70  22.80  28.25 
1990 06 31.10  24.00  27.55 
1990 07 30.40  23.10  26.75 
1990 08 30.80  23.20  27.00 
1990 09 31.50  22.50  27.00 
1990 10 31.70  21.40  26.55 
1990 12 32.09  14.80  23.45 
