1961 03 31.10  22.80  26.95 
1961 04 31.40  22.50  26.95 
1961 05 31.30  21.50  26.40 
1961 06 30.40  19.90  25.15 
1961 07 29.30  19.60  24.45 
1961 08 29.50  19.20  24.35 
1961 09 30.60  21.20  25.90 
1961 10 31.40  22.90  27.15 
1961 11 31.70  24.20  27.95 
1961 12 31.40  24.80  28.09 
1962 01 30.40  24.80  27.59 
1962 02 30.20  24.40  27.30 
1962 03 31.00  24.00  27.50 
1962 04 30.80  23.30  27.05 
1962 05 31.00  22.30  26.65 
1962 06 31.20  23.20  27.20 
1962 07 29.90  22.00  25.95 
1962 08 29.90  21.80  25.84 
1962 09 30.70  22.10  26.40 
1962 10 31.00  24.20  27.60 
1962 11 31.30 -99.99 -99.99 
1962 12 30.60 -99.99 -99.99 
1964 04 31.90  22.00  26.95 
1964 05 31.70  21.70  26.70 
1964 06 31.10  20.10  25.60 
1964 07 30.50  19.79  25.15 
1964 08 30.80  20.20  25.50 
1964 09 31.30  21.90  26.59 
1964 10 30.30  22.60  26.45 
1964 11 30.70  22.70  26.70 
1964 12 31.40  22.80  27.09 
1965 01 30.30  22.80  26.55 
1965 02 31.00  22.70  26.85 
1965 03 30.50  23.00  26.75 
1965 04 31.20  20.20  25.70 
1965 05 31.30  20.20  25.75 
1965 06 31.10  18.90  25.00 
1965 07 30.40  17.79  24.09 
1965 08 30.80  18.90  24.84 
1965 09 31.30  19.70  25.50 
1965 10 32.09  21.70  26.90 
1965 11 31.40  22.50  26.95 
1965 12 31.80  23.40  27.59 
1966 01 31.20  23.50  27.35 
1966 02 30.70  23.30  27.00 
1966 03 30.80  22.60  26.70 
1966 04 31.90  21.80  26.84 
1966 05 31.70  20.90  26.30 
1966 06 30.40  20.00  25.20 
1966 07 30.70  17.50  24.10 
1966 08 30.30  19.90  25.09 
1966 09 30.80  21.60  26.20 
1966 10 31.40  21.90  26.65 
1966 11 31.80  22.50  27.15 
1966 12 31.30  23.00  27.15 
1967 01 29.90  23.20  26.55 
1967 02 30.80  23.10  26.95 
1967 03 30.80  22.10  26.45 
1967 04 31.70  20.70  26.20 
1967 05 31.50  20.10  25.80 
1967 06 29.80  18.20  24.00 
1967 07 29.10  18.50  23.80 
1967 08 30.00  19.00  24.50 
1967 09 30.70  20.10  25.40 
1967 10 31.80  20.50  26.15 
1967 11 31.90  22.50  27.20 
1967 12 30.70  22.40  26.55 
1968 01 30.00  23.40  26.70 
1968 02 29.90  23.20  26.55 
1968 03 31.00  22.50  26.75 
1968 04 31.50  21.90  26.70 
1968 05 30.80  22.30  26.55 
1968 06 31.30  21.30  26.30 
1968 07 30.10  21.40  25.75 
1968 08 30.20  20.40  25.30 
1968 09 31.20  21.00  26.10 
1968 10 31.50  22.20  26.85 
1968 11 31.60  23.30  27.45 
1968 12 31.30  23.40  27.34 
1969 01 31.70  23.40  27.55 
1969 02 31.50  23.60  27.55 
1969 03 31.80  23.40  27.59 
1969 04 32.09  22.20  27.15 
1969 05 31.80  21.40  26.59 
1969 06 30.40  20.60  25.50 
1969 07 30.20  19.90  25.05 
1969 08 30.40  20.10  25.25 
1969 09 31.30  20.29  25.80 
1969 10 32.20  21.80  27.00 
1969 11 31.90  23.40  27.65 
1969 12 32.09  23.90  28.00 
1970 01 31.80  23.10  27.45 
1970 02 31.40  23.20  27.30 
1970 03 32.20  22.40  27.30 
1970 04 32.30  22.20  27.25 
1970 05 31.90  21.40  26.65 
1970 06 30.90  20.10  25.50 
1970 07 30.40  19.20  24.80 
1970 08 30.70  19.10  24.90 
1970 09 31.20  21.20  26.20 
1970 10 31.50  22.20  26.85 
1970 11 31.40  22.40  26.90 
1970 12 30.50  22.80  26.65 
1971 01 30.10  22.30  26.20 
1971 02 29.80  22.70  26.25 
1971 03 29.70  22.50  26.10 
1971 04 31.20  20.50  25.85 
1971 05 31.20  21.20  26.20 
1971 06 30.40  20.20  25.30 
1971 07 29.60  18.90  24.25 
1971 08 30.50  19.90  25.20 
1971 09 30.70  21.40  26.05 
1971 10 30.70  22.00  26.35 
1971 11 30.50  22.00  26.25 
1971 12 30.80  22.60  26.70 
1972 01 30.40  22.10  26.25 
1972 02 30.80  22.90  26.84 
1972 03 30.40  21.30  25.84 
1972 04 31.30  21.20  26.25 
1972 05 30.80  20.20  25.50 
1972 06 30.40  19.20  24.80 
1972 07 29.80  18.40  24.09 
1972 08 30.50  18.70  24.60 
1972 09 31.50  19.70  25.60 
1972 10 32.30  21.30  26.80 
1972 11 32.00  22.40  27.20 
1972 12 31.60  22.60  27.10 
1973 01 31.40  23.90  27.65 
1973 02 31.90  23.00  27.45 
1973 03 31.10  23.00  27.05 
1973 04 31.70  22.20  26.95 
1973 05 31.20  21.70  26.45 
1973 06 30.90  21.40  26.15 
1973 07 30.50  20.40  25.45 
1973 08 30.90  19.50  25.20 
1973 09 30.40  21.60  26.00 
1973 10 31.60  21.60  26.60 
1973 11 30.50  23.20  26.85 
1973 12 30.70  22.70  26.70 
1974 01 29.90  23.50  26.70 
1974 02 29.60  22.80  26.20 
1974 03 30.10  22.10  26.10 
1974 04 31.00  21.00  26.00 
1974 05 31.30  20.80  26.05 
1974 06 30.40  19.79  25.09 
1974 07 29.60  19.40  24.50 
1974 08 30.70  21.00  25.85 
1974 09 30.90  21.60  26.25 
1974 10 30.70  22.20  26.45 
1974 11 30.70  22.50  26.60 
1974 12 30.50  22.40  26.45 
1975 01 30.80  22.80  26.80 
1975 02 30.30  22.50  26.40 
1975 03 30.50  22.00  26.25 
1975 04 31.00  21.70  26.35 
1975 05 30.30  21.20  25.75 
1975 06 30.00  19.29  24.65 
1975 07 30.10  19.60  24.85 
1975 08 30.10  20.40  25.25 
1975 09 31.10  21.80  26.45 
1975 10 31.00  21.70  26.35 
1975 11 30.70  23.00  26.85 
1975 12 30.40  23.20  26.80 
1995 05 31.40  22.90  27.15 
1996 09 31.70  21.80  26.75 
1997 02 30.50  23.80  27.15 
1997 03 31.40  22.80  27.09 
1997 04 31.70  23.10  27.40 
1997 06 30.90  21.20  26.05 
1998 01 32.09  25.00  28.55 
2000 02 31.20  24.10  27.65 
