1979 11 31.90  19.70  25.80 
1979 12 31.50  18.79  25.15 
1980 01 32.09  17.50  24.80 
1980 02 32.50  17.90  25.20 
1980 03 34.20  19.50  26.85 
1980 04 34.30  22.30  28.30 
1980 05 35.09  22.90  29.00 
1980 06 33.40  23.00  28.20 
1980 07 33.00  22.60  27.80 
1980 08 31.50  22.30  26.90 
1980 09 30.80  21.80  26.30 
1980 10 32.70  21.30  27.00 
1980 11 32.50  20.29  26.40 
1980 12 32.20  19.00  25.60 
1981 01 31.70  18.79  25.25 
1981 02 32.59  17.40  25.00 
1981 03 32.50  18.70  25.60 
1981 04 32.70  18.29  25.50 
1981 05 34.50  13.90  24.20 
1981 06 32.09  13.80  22.95 
1981 07 33.00  14.00  23.50 
1981 08 31.70  16.29  24.00 
1981 09 31.70  16.20  23.95 
1981 10 32.20  22.10  27.15 
1981 11 32.50  13.40  22.95 
1981 12 30.80  11.40  21.09 
1982 01 34.09  16.60  25.34 
1982 02 34.30  16.40  25.34 
1982 03 33.80  12.00  22.90 
1982 04 35.20  14.80  25.00 
1982 05 34.20  16.90  25.55 
1982 06 31.80  16.79  24.30 
1982 07 32.59  15.70  24.15 
1982 08 34.30  15.50  24.90 
1982 09 32.20  16.50  24.35 
1982 10 31.70  15.00  23.35 
1982 11 32.30  12.70  22.50 
1982 12 34.00   8.60  21.30 
1983 01 33.00  12.40  22.70 
1983 02 34.30   7.50  20.90 
1983 03 32.80  10.90  21.84 
1983 04 34.70  12.10  23.40 
1983 05 35.09  15.40  25.25 
1983 06 34.20  17.20  25.70 
1983 07 33.00  16.79  24.90 
1983 08 32.50  16.50  24.50 
1983 09 30.90  16.10  23.50 
1983 10 32.40  15.30  23.85 
1983 11 32.70  14.00  23.35 
1983 12 32.70  12.40  22.55 
1984 01 32.59  10.90  21.75 
1984 02 33.50  11.50  22.50 
1984 03 34.80  10.90  22.84 
1984 04 34.09  15.00  24.55 
1984 05 34.09  15.00  24.55 
1984 06 32.50  16.10  24.30 
1984 07 32.59  15.50  24.05 
1984 08 31.10  15.10  23.10 
1984 09 30.10  15.30  22.70 
1985 01 33.80  14.60  24.20 
1985 02 33.70  15.00  24.35 
1985 04 33.59  19.40  26.50 
1985 05 34.20  21.80  28.00 
1985 06 32.50  22.00  27.25 
1985 07 31.50  15.90  23.70 
1985 08 31.60  15.70  23.65 
1985 09 32.09  15.80  23.95 
1986 03 32.80  15.60  24.20 
1986 04 33.80  18.40  26.09 
1986 05 33.09  20.60  26.84 
1986 06 32.20  19.90  26.05 
1986 07 32.00  22.50  27.25 
1986 08 32.50  23.30  27.90 
1986 09 31.10  21.90  26.50 
1986 10 32.00  20.20  26.10 
1986 11 33.30  18.79  26.05 
1986 12 32.80  15.90  24.34 
1987 01 32.00  15.00  23.50 
1987 02 32.50  14.20  23.35 
1987 03 33.09  16.90  25.00 
1987 04 34.09  18.10  26.09 
1987 05 34.70  20.20  27.45 
1987 06 33.40  20.40  26.90 
1987 07 32.20  18.70  25.45 
1987 08 32.20  17.90  25.05 
1987 09 32.59  18.90  25.75 
1987 10 33.50  18.40  25.95 
1987 11 33.90  16.60  25.25 
1988 01 33.50  14.20  23.85 
1988 02 33.70  14.80  24.25 
1988 03 33.90  16.79  25.35 
1988 04 34.09  16.29  25.20 
1988 05 34.70  17.40  26.05 
1988 06 32.70  19.40  26.05 
1988 07 31.70  18.00  24.85 
1988 08 30.10  16.40  23.25 
1988 09 30.30  16.29  23.30 
1988 10 31.10  16.70  23.90 
1988 11 31.60  15.30  23.45 
1988 12 31.70  12.90  22.30 
1989 01 32.70  13.00  22.85 
1989 02 32.40  12.70  22.55 
1989 03 32.30  14.90  23.59 
1989 04 34.59  16.20  25.40 
1989 05 35.80  25.50  30.65 
1989 06 31.90  25.20  28.55 
1989 07 31.60  23.40  27.50 
1989 08 31.00  24.40  27.70 
1989 09 30.70  24.20  27.45 
1989 10 31.10  23.60  27.35 
1989 11 32.90  23.70  28.30 
1989 12 32.00  23.00  27.50 
1990 01 32.70  21.80  27.25 
1990 02 33.00  21.50  27.25 
1990 03 34.09  22.70  28.40 
1990 04 34.59  25.90  30.25 
1990 05 33.40  26.00  29.70 
1993 09 29.90  21.80  25.84 
1993 12 32.59  17.50  25.05 
1994 01 32.59  17.50  25.05 
1994 02 33.70  17.20  25.45 
1994 06 32.80  22.20  27.50 
1994 09 34.40  20.90  27.65 
1994 10 34.80  20.60  27.70 
1994 11 31.80  19.70  25.75 
1994 12 32.80  19.00  25.90 
1995 05 33.90  22.00  27.95 
1995 06 33.00  21.60  27.30 
1995 07 31.60  21.40  26.50 
1995 08 29.60  22.20  25.90 
1995 09 31.20  21.60  26.40 
1995 10 32.20  20.70  26.45 
1995 11 33.00  19.40  26.20 
1995 12 31.50  18.20  24.85 
1996 01 31.30  16.10  23.70 
1996 02 32.70  14.70  23.70 
1996 03 33.80  16.20  25.00 
1996 04 34.50  19.90  27.20 
1996 05 33.80  22.60  28.20 
1996 06 33.59  21.00  27.30 
1996 07 34.00  20.70  27.35 
1996 08 33.90  19.90  26.90 
1996 10 33.80  20.00  26.90 
1996 11 34.00  18.20  26.10 
1996 12 32.70  19.10  25.90 
1997 01 31.90  15.70  23.80 
1997 02 33.80  16.40  25.09 
1997 04 34.50  18.20  26.35 
1997 05 34.59  21.70  28.15 
1997 06 32.59  22.20  27.40 
1997 07 34.50  21.60  28.05 
1997 08 33.80  21.60  27.70 
2000 04 35.00  11.70  23.35 
2000 05 34.40  16.40  25.40 
2000 06 31.20  14.40  22.80 
2000 07 33.00  14.20  23.60 
2000 08 32.90  21.70  27.30 
2000 09 31.60  21.70  26.65 
2000 10 33.09  21.20  27.15 
2000 11 33.90  20.90  27.40 
2000 12 33.70  18.79  26.25 
2001 01 33.70  18.00  25.85 
2001 02 34.20  19.20  26.70 
2001 03 33.20  18.70  25.95 
2001 04 34.80  19.50  27.15 
2001 05 34.30  22.40  28.34 
2001 06 33.80  22.60  28.20 
2001 07 33.40  22.40  27.90 
2001 08 33.90  22.00  27.95 
2001 09 32.30  21.40  26.84 
2001 10 32.90  21.60  27.25 
2001 11 33.70  20.70  27.20 
2001 12 34.30  11.00  22.65 
2002 01 33.80  10.00  21.90 
2002 02 34.40  10.40  22.40 
2002 03 35.70  12.10  23.90 
2002 04 36.00  14.70  25.35 
2002 05 36.70  15.30  26.00 
