Year Qmax Qmin 1931 1476 50.1 1932 948 47.9 1933 1640 50.9 1934 1440 49.0 1935 1510 57.6 1936 1580 66.8 1938 1230 54.5 1939 1680 51.9 1940 1810 61.3 1941 1000 64.4 1942 1250 50.0 1943 1250 50.5 1944 1550 49.5 1945 1450 59.5 1946 1150 57.7 1947 1500 40.0 1948 1900 52.3 1949 590 48.7 1950 1000 53.0 1951 1800 64.6 1952 1250 63.2 1953 1170 62.6 1955 2050 69.0 1956 1960 53.4 1957 1920 65.1 1958 1980 65.7 1959 670 63.5 1960 1980 64.0 1961 1270 80.0 1962 1050 64.2 1963 1010 58.2 1964 670 75.7 1965 1490 75.1 1966 1330 86.7 1967 1120 94.8 1968 1000 83.9 1969 920 60.2 1970 1470 73.9 1971 580 60.3 1972 570 57.8 1973 1640 63.4 1974 830 85.6 1975 1480 70.5 1976 1470 68.4 1977 1320 85.1 1978 1720 59.7 1979 910 65.7 1980 1450 71.5 1981 1760 66.0 1982 1340 84.6 1983 1240 79.3 1984 1010 72.9 1985 1660 49.5 1986 1450 56.8 1987 2800 64.8 1988 1330 72.6 1989 570 62.2 1990 970 52.6