"station_id" "year" "Jan" "Feb" "Mar" "Apr" "May" "Jun" "Jul" "Aug" "Sep" "Oct" "Nov" "Dec" 172751 1970 172751 1971 172751 1972 172751 1973 172751 1974 172751 1975 172751 1976 172751 1977 172751 1978 172751 1979 172751 1980 172751 1981 172751 1982 172751 1983 172751 1984 172751 1985 172751 1986 172751 1987 172751 1988 172751 1989 172751 1990 172751 1991 57 59 333 136 65 120 104 172751 1992 104 82 94 68 26 116 116 87 89 67 116 51 172751 1993 57 110 171 163 20 78 91 44 96 89 101 142