1971 01 99.99 -99.99  23.70 
1971 02 99.99 -99.99  25.10 
1971 03 99.99 -99.99  29.50 
1971 04 99.99 -99.99  29.50 
1971 05 99.99 -99.99  32.90 
1971 06 99.99 -99.99  32.20 
1971 07 99.99 -99.99  29.50 
1971 08 99.99 -99.99  28.00 
1971 09 99.99 -99.99  28.70 
1971 10 99.99 -99.99  30.20 
1971 11 99.99 -99.99  28.10 
1971 12 99.99 -99.99  22.50 
1972 01 99.99 -99.99  24.70 
1972 02 99.99 -99.99  24.40 
1972 03 99.99 -99.99  28.00 
1972 04 99.99 -99.99  31.10 
1972 05 99.99 -99.99  34.00 
1972 06 99.99 -99.99  32.59 
1972 07 99.99 -99.99  30.30 
1972 08 99.99 -99.99  29.40 
1972 09 99.99 -99.99  30.90 
1972 10 99.99 -99.99  31.10 
1972 11 99.99 -99.99  27.80 
1972 12 99.99 -99.99  24.20 
1973 01 99.99 -99.99  23.90 
1973 02 99.99 -99.99  28.20 
1973 03 99.99 -99.99  29.10 
1973 04 99.99 -99.99  33.50 
1973 05 99.99 -99.99  34.50 
1973 06 99.99 -99.99  33.50 
1973 07 99.99 -99.99  30.90 
1973 08 99.99 -99.99  29.90 
1973 09 99.99 -99.99  30.80 
1973 10 99.99 -99.99  31.30 
1973 11 99.99 -99.99  27.50 
1973 12 99.99 -99.99  25.50 
1974 01 99.99 -99.99  22.70 
1974 02 99.99 -99.99  25.90 
1974 03 99.99 -99.99  26.80 
1974 04 99.99 -99.99  32.30 
1974 05 99.99 -99.99  33.20 
1974 06 99.99 -99.99  32.50 
1974 07 99.99 -99.99  28.50 
1974 08 99.99 -99.99  28.50 
1974 09 99.99 -99.99  30.10 
1974 10 99.99 -99.99  30.90 
1974 11 99.99 -99.99  28.20 
1974 12 99.99 -99.99  24.10 
1975 01 99.99 -99.99  23.70 
1975 02 99.99 -99.99  26.70 
1975 03 99.99 -99.99  28.70 
1975 04 99.99 -99.99  31.10 
1975 05 99.99 -99.99  34.50 
1975 06 99.99 -99.99  32.09 
1975 07 99.99 -99.99  31.10 
1975 08 99.99 -99.99  27.50 
1975 09 99.99 -99.99  28.30 
1975 10 99.99 -99.99  29.50 
1975 11 99.99 -99.99  28.70 
1975 12 99.99 -99.99  24.60 
1976 01 99.99 -99.99  24.30 
1976 02 99.99 -99.99  24.70 
1976 03 99.99 -99.99  29.40 
1976 04 99.99 -99.99  31.30 
1976 05 99.99 -99.99  34.30 
1976 06 99.99 -99.99  33.30 
1976 07 99.99 -99.99  29.30 
1976 08 99.99 -99.99  30.00 
1976 09 99.99 -99.99  30.10 
1976 10 99.99 -99.99  31.10 
1976 11 99.99 -99.99  28.50 
1976 12 99.99 -99.99  27.00 
1977 01 99.99 -99.99  22.80 
1977 02 99.99 -99.99  25.70 
1977 03 99.99 -99.99  28.80 
1977 04 99.99 -99.99  29.80 
1977 05 99.99 -99.99  33.09 
1977 06 99.99 -99.99  32.90 
1977 07 99.99 -99.99  30.60 
1977 08 99.99 -99.99  28.70 
1977 09 99.99 -99.99  31.30 
1977 10 99.99 -99.99  29.50 
1977 11 99.99 -99.99  27.90 
1977 12 99.99 -99.99  25.00 
1978 01 99.99 -99.99  23.90 
1978 02 99.99 -99.99  26.10 
1978 03 99.99 -99.99  28.10 
1978 04 99.99 -99.99  33.09 
1978 05 99.99 -99.99  34.50 
1978 06 99.99 -99.99  33.50 
1978 07 99.99 -99.99  27.60 
1978 08 99.99 -99.99  28.70 
1978 09 99.99 -99.99  30.50 
1978 10 99.99 -99.99  31.10 
1978 11 99.99 -99.99  27.10 
1978 12 99.99 -99.99  25.90 
1979 01 99.99 -99.99  24.90 
1979 02 99.99 -99.99  27.30 
1979 03 99.99 -99.99  28.50 
1979 04 99.99 -99.99  33.09 
1979 05 99.99 -99.99  33.30 
1979 06 99.99 -99.99  33.09 
1979 07 99.99 -99.99  31.00 
1979 08 99.99 -99.99  29.90 
1979 09 99.99 -99.99  30.50 
1979 10 99.99 -99.99  31.50 
1979 11 99.99 -99.99  29.30 
1979 12 99.99 -99.99  24.00 
1980 01 99.99 -99.99  24.30 
1980 02 99.99 -99.99  26.10 
1980 03 99.99 -99.99  29.30 
1980 04 99.99 -99.99  32.70 
1980 05 99.99 -99.99  35.20 
1980 06 99.99 -99.99  33.00 
1980 07 99.99 -99.99  29.80 
1980 08 99.99 -99.99  29.20 
1980 09 99.99 -99.99  30.70 
1980 10 99.99 -99.99  31.90 
1980 11 99.99 -99.99  28.70 
1980 12 99.99 -99.99  26.10 
1981 01 34.30  15.90  25.09 
1981 02 35.20  15.70  25.45 
1981 03 38.30  19.60  28.95 
1981 04 40.50  21.40  30.95 
1981 05 42.40  25.70  34.05 
1981 06 41.60  26.60  34.09 
1981 07 37.20  23.70  30.45 
1981 08 38.30  23.90  31.09 
1981 09 35.80  22.60  29.20 
1981 10 39.20  23.00  31.10 
1981 11 36.30  19.90  28.09 
1981 12 35.59  17.79  26.70 
1982 01 34.09  16.29  25.20 
1982 02 32.59  13.20  22.90 
1982 03 37.59  18.70  28.15 
1982 04 41.30  21.40  31.34 
1982 05 42.10  24.50  33.30 
1982 06 41.30  25.00  33.15 
1982 07 39.09  24.80  31.95 
1982 08 36.59  23.50  30.05 
1982 09 38.20  23.20  30.70 
1982 10 38.80  22.90  30.84 
1982 11 35.00  17.50  26.25 
1982 12 33.59  14.60  24.09 
1983 01 30.50  11.90  21.20 
1983 02 33.90  14.30  24.10 
1983 03 36.30  15.90  26.09 
1983 04 40.20  19.70  29.95 
1983 05 42.50  24.90  33.70 
1983 06 40.70  25.30  33.00 
1983 07 39.30  25.50  32.40 
1983 08 37.20  23.90  30.55 
1983 09 38.90  24.40  31.65 
1983 10 39.70  23.30  31.50 
1983 11 37.59  19.50  28.55 
1983 12 34.40  17.10  25.75 
1984 01 32.90  14.50  23.70 
1984 02 36.80  17.29  27.05 
1984 03 40.30  20.40  30.34 
1984 04 42.00  22.40  32.20 
1984 05 42.30  25.70  34.00 
1984 06 40.90  25.50  33.20 
1984 07 39.30  25.10  32.20 
1984 08 40.00  25.20  32.59 
1984 09 39.70  24.40  32.05 
1984 10 40.90  23.20  32.05 
1984 11 36.70  19.10  27.90 
1984 12 34.70  17.29  26.00 
1985 01 36.30  17.40  26.84 
1985 02 33.70  15.10  24.40 
1985 03 40.40  20.90  30.65 
1985 04 40.80  21.90  31.34 
1985 05 40.40  24.90  32.65 
1985 06 39.59  25.10  32.34 
1985 07 37.30  23.40  30.34 
1985 08 37.50  23.70  30.60 
1985 09 37.70  23.10  30.40 
1985 10 39.80  23.70  31.75 
1985 11 37.00  18.90  27.95 
1985 12 34.20  17.10  25.65 
1986 01 33.80  15.20  24.50 
1986 02 36.70  16.50  26.60 
1986 03 39.90  19.79  29.85 
1986 04 40.00  20.40  30.20 
1986 05 41.80  22.90  32.34 
1986 06 40.00  26.00  33.00 
1986 07 37.00  23.70  30.35 
1986 08 37.00  23.00  30.00 
1986 09 36.80  23.20  30.00 
1986 10 38.20  23.30  30.75 
1986 11 36.80  19.50  28.15 
1986 12 32.80  14.40  23.59 
1987 01 33.80  15.20  24.50 
1987 02 36.59  17.70  27.15 
1987 03 38.00  18.70  28.35 
1987 04 41.40  23.10  32.25 
1987 05 39.90  24.50  32.20 
1987 06 40.00  25.70  32.84 
1987 07 38.80  24.70  31.75 
1987 08 36.90  23.70  30.30 
1987 09 40.00  25.10  32.55 
1987 10 38.90  24.30  31.60 
1987 11 38.00  20.70  29.35 
1987 12 33.90  16.79  25.35 
1988 01 33.20  15.10  24.15 
1988 02 35.00  15.50  25.25 
1988 03 39.50  19.90  29.70 
1988 04 41.70  21.10  31.40 
1988 05 42.70  26.00  34.34 
1988 06 39.80  25.90  32.84 
1988 07 35.00  23.80  29.40 
1988 08 32.50  22.70  27.60 
1988 09 34.20  22.30  28.25 
1988 10 37.70  22.60  30.15 
1988 11 36.50  19.20  27.85 
1988 12 35.09  16.90  26.00 
1989 01 30.70  12.10  21.40 
1989 02 32.00  13.20  22.60 
1989 03 36.40  17.79  27.10 
1989 04 40.20  21.10  30.65 
1989 05 40.90  25.30  33.09 
1989 06 40.20  25.80  33.00 
1989 07 38.20  24.70  31.45 
1989 08 35.50  23.20  29.35 
1989 09 36.80  23.60  30.20 
1989 10 38.80  23.10  30.95 
1989 11 37.59  21.00  29.30 
1989 12 32.59  15.30  23.95 
1990 01 33.40  15.30  24.35 
1990 02 32.30  13.80  23.05 
1990 03 36.20  16.70  26.45 
1990 04 40.90  21.70  31.30 
1990 05 42.80  24.60  33.70 
1990 06 41.60  27.20  34.40 
1990 07 38.70  25.30  32.00 
1990 08 40.00  25.80  32.90 
1990 09 39.00  24.40  31.70 
1990 10 40.09  24.30  32.19 
1990 11 38.40  20.80  29.60 
1990 12 34.70  17.70  26.20 
