year mth T 1949 1 26.0 1949 2 26.5 1949 3 25.0 1949 4 21.8 1949 5 19.6 1949 6 19.5 1949 7 19.4 1949 8 16.8 1949 9 18.2 1949 10 23.5 1949 11 23.3 1949 12 25.9 1950 1 27.4 1950 2 26.9 1950 3 26.1 1950 4 24.6 1950 5 21.8 1950 6 19.0 1950 7 18.4 1950 8 17.1 1950 9 20.2 1950 10 22.9 1950 11 23.4 1950 12 26.8 1951 1 26.8 1951 2 25.8 1951 3 26.5 1951 4 25.0 1951 5 20.1 1951 6 20.6 1951 7 16.9 1951 8 18.4 1951 9 19.3 1951 10 23.2 1951 11 22.0 1951 12 25.1 1952 1 24.0 1952 2 26.9 1952 3 25.2 1952 4 22.9 1952 5 21.2 1952 6 19.0 1952 7 15.7 1952 8 18.4 1952 9 19.3 1952 10 22.1 1952 11 22.2 1952 12 24.6 1953 1 24.9 1953 2 24.9 1953 3 25.1 1953 4 22.0 1953 5 20.2 1953 6 19.2 1953 7 18.4 1953 8 17.7 1953 9 19.5 1953 10 20.7 1953 11 24.8 1953 12 26.8 1954 1 26.8 1954 2 28.2 1954 3 26.6 1954 4 23.4 1954 5 21.3 1954 6 20.3 1954 7 18.4 1954 8 17.7 1954 9 19.3 1954 10 21.3 1954 11 25.1 1954 12 25.8 1955 1 28.6 1955 2 30.1 1955 3 28.7 1955 4 24.6 1955 5 22.1 1955 6 18.2 1955 7 16.6 1955 8 19.2 1955 9 20.9 1955 10 19.8 1955 11 22.2 1955 12 27.8 1956 1 28.3 1956 2 25.9 1956 3 25.8 1956 4 24.0 1956 5 20.8 1956 6 18.8 1956 7 16.6 1956 8 17.7 1956 9 20.9 1956 10 21.3 1956 11 23.1 1956 12 24.2 1957 1 26.2 1957 2 26.8 1957 3 26.1 1957 4 22.9 1957 5 24.4 1957 6 17.1 1957 7 16.5 1957 8 18.4 1957 9 19.3 1957 10 19.6 1957 11 23.3 1957 12 24.6 1958 1 27.4 1958 2 27.1 1958 3 25.8 1958 4 23.5 1958 5 20.8 1958 6 19.6 1958 7 16.8 1958 8 18.1 1958 9 18.3 1958 10 22.9 1958 11 23.1 1958 12 24.7 1959 1 27.4 1959 2 25.5 1959 3 25.4 1959 4 23.0 1959 5 18.9 1959 6 17.7 1959 7 17.3 1959 8 18.5 1959 9 20.1 1959 10 21.2 1959 11 21.8 1959 12 24.6 1960 1 26.7 1960 2 27.1 1960 3 23.4 1960 4 21.8 1960 5 20.1 1960 6 18.5 1960 7 17.3 1960 8 17.8 1960 9 19.5 1960 10 21.0 1960 11 21.8 1960 12 23.7 1961 1 24.6 1961 2 25.2 1961 3 24.9 1961 4 22.9 1961 5 19.6 1961 6 20.7 1961 7 18.6 1961 8 16.4 1961 9 20.4 1961 10 20.4 1961 11 22.2 1961 12 25.5 1962 1 27.9 1962 2 27.3 1962 3 25.3 1962 4 24.2 1962 5 23.1 1962 6 18.9 1962 7 17.6 1962 8 17.7 1962 9 19.0 1962 10 20.5 1962 11 21.7 1962 12 23.9 1963 1 26.6 1963 2 26.0 1963 3 24.4 1963 4 22.7 1963 5 20.0 1963 6 20.0 1963 7 17.8 1963 8 17.8 1963 9 19.8 1963 10 20.1 1963 11 22.3 1963 12 23.8 1964 1 24.8 1964 2 27.2 1964 3 24.8 1964 4 21.7 1964 5 19.7 1964 6 19.3 1964 7 17.4 1964 8 19.6 1964 9 18.4 1964 10 20.1 1964 11 23.4 1964 12 24.4 1965 1 25.0 1965 2 26.0 1965 3 24.2 1965 4 24.6 1965 5 18.3 1965 6 18.8 1965 7 16.2 1965 8 16.8 1965 9 18.9 1965 10 20.0 1965 11 22.2 1965 12 24.4 1966 1 24.5 1966 2 27.2 1966 3 25.9 1966 4 24.0 1966 5 19.9 1966 6 18.7 1966 7 16.9 1966 8 16.6 1966 9 17.8 1966 10 19.8 1966 11 22.2 1966 12 23.4 1967 1 26.4 1967 2 24.9 1967 3 24.9 1967 4 22.2 1967 5 19.9 1967 6 16.7 1967 7 18.3 1967 8 18.3 1967 9 18.3 1967 10 21.5 1967 11 22.8 1967 12 23.4 1968 1 25.8 1968 2 26.5 1968 3 26.7 1968 4 23.6 1968 5 21.8 1968 6 16.9 1968 7 17.5 1968 8 17.8 1968 9 17.8 1968 10 20.7 1968 11 21.9 1968 12 22.4 1969 1 23.8 1969 2 26.1 1969 3 24.0 1969 4 23.6 1969 5 19.4 1969 6 17.7 1969 7 15.6 1969 8 16.6 1969 9 17.8 1969 10 17.9 1969 11 23.9 1969 12 27.2 1970 1 27.2 1970 2 26.7 1970 3 26.1 1970 4 22.7 1970 5 22.2 1970 6 19.4 1970 7 17.9 1970 8 17.8 1970 9 19.6 1970 10 22.9 1970 11 24.2 1970 12 27.5 1971 1 27.7 1971 2 27.7 1971 3 24.0 1971 4 22.3 1971 5 21.1 1971 6 20.0 1971 7 20.0 1971 8 20.0 1971 9 18.2 1971 10 20.9 1971 11 22.1 1971 12 24.6 1972 1 25.8 1972 2 25.6 1972 3 26.8 1972 4 22.5 1972 5 20.2 1972 6 16.1 1972 7 16.8 1972 8 18.0 1972 9 19.3 1972 10 21.0 1972 11 24.0 1972 12 24.6 1973 1 26.7 1973 2 28.6 1973 3 26.2 1973 4 21.8 1973 5 21.0 1973 6 18.9 1973 7 16.8 1973 8 18.6 1973 9 20.8 1973 10 21.2 1973 11 23.5 1973 12 25.9 1974 1 27.5 1974 2 28.9 1974 3 26.2 1974 4 25.5 1974 5 20.9 1974 6 19.1 1974 7 18.3 1974 8 17.3 1974 9 20.1 1974 10 21.4 1974 11 25.3 1974 12 25.9 1975 1 28.0 1975 2 26.7 1975 3 25.0 1975 4 23.8 1975 5 21.2 1975 6 17.9 1975 7 17.0 1975 8 18.4 1975 9 20.0 1975 10 22.4 1975 11 21.6 1975 12 23.7 1976 1 27.0 1976 2 23.5 1976 3 25.7 1976 4 23.4 1976 5 18.5 1976 6 18.2 1976 7 17.5 1976 8 17.5 1976 9 18.6 1976 10 21.5 1976 11 21.6 1976 12 24.9 1977 1 24.6 1977 2 26.0 1977 3 26.5 1977 4 23.7 1977 5 17.8 1977 6 17.6 1977 7 16.6 1977 8 17.2 1977 9 17.5 1977 10 18.9 1977 11 20.8 1977 12 23.5 1978 1 28.0 1978 2 28.7 1978 3 25.1 1978 4 24.0 1978 5 20.6 1978 6 18.9 1978 7 18.7 1978 8 16.4 1978 9 18.0 1978 10 19.0 1978 11 24.0 1978 12 25.1 1979 1 27.2 1979 2 25.5 1979 3 25.6 1979 4 23.3 1979 5 21.5 1979 6 17.5 1979 7 17.2 1979 8 17.6 1979 9 18.7 1979 10 22.0 1979 11 23.4 1979 12 25.3 1980 1 27.6 1980 2 27.0 1980 3 24.7 1980 4 22.0 1980 5 19.5 1980 6 18.5 1980 7 16.8 1980 8 17.5 1980 9 18.8 1980 10 21.9 1980 11 22.0 1980 12 24.6 1981 1 28.2 1981 2 26.3 1981 3 25.6 1981 4 23.6 1981 5 21.8 1981 6 19.9 1981 7 18.5 1981 8 17.2 1981 9 18.9 1981 10 20.2 1981 11 23.0 1981 12 26.0 1982 1 27.1 1982 2 27.7 1982 3 25.4 1982 4 21.8 1982 5 20.1 1982 6 17.6 1982 7 18.0 1982 8 16.7 1982 9 20.2 1982 10 19.4 1982 11 24.2 1982 12 25.8 1983 1 26.1 1983 2 24.9 1983 3 25.4 1983 4 22.5 1983 5 20.0 1983 6 17.1 1983 7 16.2 1983 8 17.1 1983 9 20.1 1983 10 21.0 1983 11 NA 1983 12 22.6 1984 1 23.7 1984 2 25.6 1984 3 25.0 1984 4 23.0 1984 5 20.7 1984 6 18.0 1984 7 18.5 1984 8 18.4 1984 9 19.0 1984 10 22.2 1984 11 24.7 1984 12 26.1 1985 1 26.7 1985 2 25.9 1985 3 25.1 1985 4 21.6 1985 5 20.2 1985 6 19.6 1985 7 17.7 1985 8 16.6 1985 9 18.7 1985 10 20.7 1985 11 21.9 1985 12 24.7 1986 1 27.4 1986 2 25.8 1986 3 26.3 1986 4 23.8 1986 5 20.7 1986 6 18.7 1986 7 16.3 1986 8 16.8 1986 9 19.4 1986 10 21.5 1986 11 22.3 1986 12 24.2 1987 1 26.1 1987 2 25.7 1987 3 23.9 1987 4 23.7 1987 5 20.1 1987 6 16.8 1987 7 16.0 1987 8 18.2 1987 9 18.9 1987 10 21.7 1987 11 22.5 1987 12 25.6 1988 1 27.0 1988 2 26.9 1988 3 26.4 1988 4 22.0 1988 5 21.0 1988 6 18.3 1988 7 17.3 1988 8 19.2 1988 9 21.0 1988 10 23.0 1988 11 23.0 1988 12 25.4 1989 1 27.0 1989 2 25.0 1989 3 25.9 1989 4 23.5 1989 5 21.5 1989 6 18.9 1989 7 17.8 1989 8 19.0 1989 9 21.0 1989 10 20.7 1989 11 22.4 1989 12 25.5 1990 1 28.7 1990 2 27.4 1990 3 27.3 1990 4 23.8 1990 5 21.4 1990 6 19.5 1990 7 17.9 1990 8 17.7 1990 9 19.6 1990 10 20.8 1990 11 21.6 1990 12 24.5 1991 1 27.3 1991 2 28.9 1991 3 24.2 1991 4 23.2 1991 5 19.8 1991 6 18.0 1991 7 16.3 1991 8 18.9 1991 9 18.8 1991 10 20.2 1991 11 19.9 1991 12 25.1 1992 1 26.0 1992 2 26.5 1992 3 24.1 1992 4 21.5 1992 5 18.8 1992 6 18.4 1992 7 17.7 1992 8 17.1 1992 9 17.1 1992 10 19.0 1992 11 22.7 1992 12 24.6 1993 1 26.1 1993 2 25.2 1993 3 25.1 1993 4 23.3 1993 5 19.7 1993 6 17.9 1993 7 17.2 1993 8 16.4 1993 9 17.9 1993 10 20.9 1993 11 20.9 1993 12 NA 1994 1 26.8 1994 2 26.0 1994 3 25.8 1994 4 23.0 1994 5 21.2 1994 6 19.2 1994 7 16.2 1994 8 17.0 1994 9 17.6 1994 10 20.4 1994 11 23.0 1994 12 25.7 1995 1 25.0 1995 2 26.2 1995 3 25.1 1995 4 24.5 1995 5 22.6 1995 6 18.3 1995 7 16.7 1995 8 16.6 1995 9 20.9 1995 10 20.0 1995 11 23.1 1995 12 26.5 1996 1 27.7 1996 2 26.7 1996 3 24.3 1996 4 23.5 1996 5 20.6 1996 6 NA 1996 7 18.1 1996 8 18.5 1996 9 21.0 1996 10 21.0 1996 11 21.8 1996 12 24.4 1997 1 25.9 1997 2 27.4 1997 3 26.0 1997 4 23.8 1997 5 20.0 1997 6 17.1 1997 7 16.6 1997 8 18.3 1997 9 18.7 1997 10 21.0 1997 11 22.8 1997 12 26.4 1998 1 27.9 1998 2 30.5 1998 3 26.2 1998 4 26.0 1998 5 20.6 1998 6 21.1 1998 7 19.0 1998 8 18.0 1998 9 19.8 1998 10 22.8 1998 11 22.6 1998 12 27.1 1999 1 NA 1999 2 25.8 1999 3 26.3 1999 4 26.7 1999 5 21.5 1999 6 20.5 1999 7 18.0 1999 8 17.2 1999 9 19.5 1999 10 21.2 1999 11 22.5 1999 12 23.5 2000 1 26.5 2000 2 25.2 2000 3 25.2 2000 4 23.5 2000 5 21.2 2000 6 18.5 2000 7 19.3 2000 8 18.5 2000 9 19.9 2000 10 21.0 2000 11 21.4 2000 12 26.2