1 1950 9.2 2 1950 9.6 3 1950 7.6 4 1950 6.2 5 1950 5.3 6 1950 4.8 7 1950 4.6 8 1950 4.4 9 1950 4.2 10 1950 4.3 11 1950 5.7 12 1950 8.8 1 1951 10.6 2 1951 9.6 3 1951 7.8 4 1951 5.7 5 1951 4.7 6 1951 3.8 7 1951 3.5 8 1951 3.3 9 1951 3.2 10 1951 3.4 11 1951 4.4 12 1951 7.2 1 1952 9.4 2 1952 10.2 3 1952 9.1 4 1952 7.0 5 1952 5.9 6 1952 5.6 7 1952 5.5 8 1952 5.5 9 1952 5.5 10 1952 6.0 11 1952 8.3 12 1952 11.9 1 1953 13.7 2 1953 13.4 3 1953 10.9 4 1953 8.5 5 1953 7.4 6 1953 6.8 7 1953 6.3 8 1953 6.1 9 1953 6.0 10 1953 6.4 11 1953 7.9 12 1953 11.4 1 1954 14.1 2 1954 14.4 3 1954 11.4 4 1954 8.4 5 1954 6.6 6 1954 5.6 7 1954 5.1 8 1954 4.5 9 1954 4.2 10 1954 4.2 11 1954 5.2 12 1954 8.0 1 1955 10.5 2 1955 10.0 3 1955 8.8 4 1955 5.4 5 1955 3.8 6 1955 3.3 7 1955 3.1 8 1955 2.8 9 1955 3.0 10 1955 3.3 11 1955 4.0 12 1955 6.7 1 1956 8.8 2 1956 9.9 3 1956 8.6 4 1956 5.0 5 1956 3.7 6 1956 3.1 7 1956 2.8 8 1956 2.6 9 1956 2.7 10 1956 3.0 11 1956 4.5 12 1956 6.8 1 1957 9.4 2 1957 9.1 3 1957 6.6 4 1957 4.5 5 1957 3.4 6 1957 2.9 7 1957 2.6 8 1957 2.5 9 1957 2.6 10 1957 2.8 11 1957 3.8 12 1957 6.5 1 1958 8.8 2 1958 9.0 3 1958 8.2 4 1958 5.2 5 1958 3.6 6 1958 3.0 7 1958 2.9 8 1958 2.8 9 1958 2.9 10 1958 3.3 11 1958 4.2 12 1958 7.2 1 1959 9.5 2 1959 9.5 3 1959 7.0 4 1959 4.1 5 1959 3.1 6 1959 2.5 7 1959 2.4 8 1959 2.2 9 1959 2.3 10 1959 2.7 11 1959 3.6 12 1959 6.1 1 1960 8.1 2 1960 7.6 3 1960 5.0 4 1960 3.0 5 1960 2.2 6 1960 1.8 7 1960 1.7 8 1960 1.6 9 1960 1.7 10 1960 2.1 11 1960 2.7 12 1960 4.3 1 1961 6.2 2 1961 5.7 3 1961 3.2 4 1961 2.1 5 1961 1.6 6 1961 1.4 7 1961 1.3 8 1961 1.2 9 1961 1.3 10 1961 1.7 11 1961 2.3 12 1961 4.0 1 1962 5.6 2 1962 5.2 3 1962 3.9 4 1962 2.2 5 1962 1.6 6 1962 1.4 7 1962 1.3 8 1962 1.3 9 1962 1.3 10 1962 1.7 11 1962 2.4 12 1962 4.4 1 1963 6.2 2 1963 6.5 3 1963 4.4 4 1963 2.3 5 1963 1.7 6 1963 1.5 7 1963 1.4 8 1963 1.3 9 1963 1.4 10 1963 1.8 11 1963 2.3 12 1963 4.3 1 1964 5.9 2 1964 5.4 3 1964 3.8 4 1964 2.1 5 1964 1.6 6 1964 1.4 7 1964 1.3 8 1964 1.3 9 1964 1.4 10 1964 1.8 11 1964 2.4 12 1964 3.8 1 1965 5.4 2 1965 5.3 3 1965 3.8 4 1965 2.1 5 1965 1.7 6 1965 1.5 7 1965 1.4 8 1965 1.3 9 1965 1.5 10 1965 1.8 11 1965 2.5 12 1965 3.9 1 1966 5.2 2 1966 4.7 3 1966 2.8 4 1966 2.1 5 1966 1.7 6 1966 1.5 7 1966 1.4 8 1966 1.4 9 1966 1.4 10 1966 1.8 11 1966 2.5 12 1966 3.7 1 1967 4.9 2 1967 4.6 3 1967 3.0 4 1967 2.3 5 1967 1.8 6 1967 1.6 7 1967 1.5 8 1967 1.5 9 1967 1.6 10 1967 2.1 11 1967 2.8 12 1967 4.3 1 1968 5.9 2 1968 5.5 3 1968 3.9 4 1968 2.4 5 1968 2.0 6 1968 1.8 7 1968 1.6 8 1968 1.5 9 1968 1.7 10 1968 2.1 11 1968 2.8 12 1968 4.2 1 1969 5.7 2 1969 5.5 3 1969 3.9 4 1969 2.4 5 1969 1.9 6 1969 1.7 7 1969 1.5 8 1969 1.4 9 1969 1.5 10 1969 1.9 11 1969 2.4 12 1969 3.7 1 1970 4.7 2 1970 4.3 3 1970 3.5 4 1970 2.2 5 1970 1.7 6 1970 1.5 7 1970 1.4 8 1970 1.3 9 1970 1.3 10 1970 1.8 11 1970 2.2 12 1970 2.8 1 1971 3.7 2 1971 3.2 3 1971 2.5 4 1971 1.9 5 1971 1.7 6 1971 1.5 7 1971 1.4 8 1971 1.3 9 1971 1.4 10 1971 1.8 11 1971 2.2 12 1971 2.7 1 1972 3.2 2 1972 2.9 3 1972 2.1 4 1972 1.9 5 1972 1.6 6 1972 1.5 7 1972 1.3 8 1972 1.3 9 1972 1.3 10 1972 1.7 11 1972 2.1 12 1972 2.2 1 1973 2.4 2 1973 2.3 3 1973 1.8 4 1973 1.4 5 1973 1.2 6 1973 1.0 7 1973 1.0 8 1973 1.0 9 1973 1.1 10 1973 1.5 11 1973 1.8 12 1973 2.3 1 1974 2.7 2 1974 2.4 3 1974 1.8 4 1974 1.5 5 1974 1.2 6 1974 1.0 7 1974 .9 8 1974 .8 9 1974 .9 10 1974 1.3 11 1974 1.7 12 1974 2.2 1 1975 2.8 2 1975 2.7 3 1975 2.2 4 1975 2.1 5 1975 1.7 6 1975 1.4 7 1975 1.3 8 1975 1.3 9 1975 1.5 10 1975 2.0 11 1975 2.5 12 1975 3.1 1 1976 3.6 2 1976 3.5 3 1976 2.8 4 1976 2.0 5 1976 1.6 6 1976 1.2 7 1976 1.2 8 1976 1.1 9 1976 1.2 10 1976 1.6 11 1976 2.0 12 1976 2.5 1 1977 3.2 2 1977 2.9 3 1977 2.0 4 1977 1.7 5 1977 1.3 6 1977 1.0 7 1977 1.0 8 1977 1.0 9 1977 1.2 10 1977 1.7 11 1977 2.2 12 1977 2.7 1 1978 3.3 2 1978 3.2 3 1978 2.4 4 1978 2.1 5 1978 1.6 6 1978 1.3 7 1978 1.3 8 1978 1.3 9 1978 1.4 10 1978 1.9 11 1978 2.4 12 1978 2.8 1 1979 3.5 2 1979 3.3 3 1979 2.4 4 1979 2.0 5 1979 1.7 6 1979 1.2 7 1979 1.2 8 1979 1.2 9 1979 1.2 10 1979 1.7 11 1979 2.2 12 1979 2.4 1 1980 3.2 2 1980 2.9 3 1980 2.1 4 1980 1.7 5 1980 1.4 6 1980 1.0 7 1980 1.0 8 1980 1.0 9 1980 1.2 10 1980 1.8 11 1980 2.3 12 1980 2.8 1 1981 3.7 2 1981 3.5 3 1981 2.5 4 1981 2.0 5 1981 1.7 6 1981 1.3 7 1981 1.4 8 1981 1.4 9 1981 1.7 10 1981 2.4 11 1981 3.2 12 1981 4.1 1 1982 5.4 2 1982 5.1 3 1982 4.0 4 1982 3.4 5 1982 2.8 6 1982 2.3 7 1982 2.4 8 1982 2.4 9 1982 2.7 10 1982 3.6 11 1982 4.4 12 1982 5.4 1 1983 6.3 2 1983 6.3 3 1983 5.3 4 1983 4.7 5 1983 3.9 6 1983 3.2 7 1983 3.1 8 1983 3.0 9 1983 3.3 10 1983 4.0 11 1983 4.7 12 1983 5.6 1 1984 6.7 2 1984 6.6 3 1984 5.5 4 1984 4.7 5 1984 3.9 6 1984 3.2 7 1984 3.2 8 1984 3.2 9 1984 3.3 10 1984 4.0 11 1984 4.8 12 1984 5.4 1 1985 6.9 2 1985 6.7 3 1985 5.9 4 1985 5.0 5 1985 4.0 6 1985 3.4 7 1985 3.3 8 1985 3.3 9 1985 3.6 10 1985 4.2 11 1985 5.2 12 1985 6.3 1 1986 7.0 2 1986 6.9 3 1986 6.2 4 1986 5.3 5 1986 4.2 6 1986 3.7 7 1986 3.7 8 1986 3.8 9 1986 4.1 10 1986 4.8 11 1986 5.6 12 1986 6.9 1 1987 7.9 2 1987 7.6 3 1987 7.0 4 1987 5.7 5 1987 4.8 6 1987 4.2 7 1987 4.0 8 1987 4.0 9 1987 4.3 10 1987 5.0 11 1987 5.6 12 1987 6.8 1 1988 7.7 2 1988 7.3 3 1988 6.4 4 1988 5.6 5 1988 4.7 6 1988 4.0 7 1988 4.0 8 1988 4.0 9 1988 4.2 10 1988 4.7 11 1988 5.5 12 1988 6.3 1 1989 7.0 2 1989 6.7 3 1989 5.3 4 1989 5.0 5 1989 4.3 6 1989 3.8 7 1989 3.7 8 1989 3.8 9 1989 3.9 10 1989 4.5 11 1989 5.3 12 1989 6.2 1 1990 6.9 2 1990 6.6 3 1990 5.4 4 1990 5.1 5 1990 4.7 6 1990 4.3 7 1990 4.3 8 1990 4.4 9 1990 4.6 10 1990 5.2 11 1990 6.0 12 1990 6.9 1 1991 7.5 2 1991 7.5 3 1991 6.4 4 1991 5.9 5 1991 5.2 6 1991 4.7 7 1991 4.6 8 1991 4.7 9 1991 4.8 10 1991 5.5 11 1991 6.1 12 1991 7.0 1 1992 7.8 2 1992 7.3 3 1992 6.2 4 1992 5.8 5 1992 5.2 6 1992 4.7 7 1992 4.6 8 1992 4.8 9 1992 5.0 10 1992 5.8 11 1992 6.5 12 1992 7.7 1 1993 8.4 2 1993 8.2 3 1993 7.3 4 1993 6.9 5 1993 6.2 6 1993 5.7 7 1993 5.6 8 1993 5.6 9 1993 5.8 10 1993 6.4 11 1993 7.1 12 1993 8.2 1 1994 8.7 2 1994 8.3 3 1994 7.0 4 1994 6.8 5 1994 6.0 6 1994 5.4 7 1994 5.2 8 1994 5.3 9 1994 5.5 10 1994 6.1 11 1994 6.6 12 1994 7.6 1 1995 8.5 2 1995 8.0 3 1995 7.0 4 1995 6.5 5 1995 5.9 6 1995 5.4 7 1995 5.3 8 1995 5.4 9 1995 5.5 10 1995 6.2 11 1995 7.1 12 1995 8.2 1 1996 9.0 2 1996 9.0 3 1996 8.1 4 1996 7.3 5 1996 6.4 6 1996 5.8 7 1996 5.6 8 1996 5.7 9 1996 5.8 10 1996 6.5 11 1996 7.2 12 1996 8.0 1 1997 9.2 2 1997 8.8 3 1997 7.7 4 1997 7.2 5 1997 6.5 6 1997 5.9 7 1997 5.8 8 1997 5.8 9 1997 6.0 10 1997 6.7 11 1997 7.3 12 1997 8.2 1 1998 9.1 2 1998 9.0 3 1998 7.9 4 1998 7.3 5 1998 6.6 6 1998 6.1 7 1998 5.9 8 1998 5.9 9 1998 6.1 10 1998 6.6 11 1998 7.3 12 1998 8.2 1 1999 9.1 2 1999 9.0 3 1999 7.6 4 1999 7.0 5 1999 6.1 6 1999 5.5 7 1999 5.3 8 1999 5.3 9 1999 5.4 10 1999 5.8 11 1999 6.6 12 1999 7.3 1 2000 8.4 2 2000 8.0 3 2000 6.6 4 2000 5.9 5 2000 5.3 6 2000 4.7 7 2000 4.5 8 2000 4.6 9 2000 4.6 10 2000 5.2 11 2000 5.8 12 2000 6.5 1 2001 7.7 2 2001 7.5 3 2001 6.4 4 2001 5.8 5 2001 5.3 6 2001 4.9 7 2001 4.8 8 2001 5.0 9 2001 5.2 10 2001 5.8 11 2001 6.7 12 2001 8.0 1 2002 8.9 2 2002 8.5 3 2002 7.4 4 2002 6.9 5 2002 6.2 6 2002 5.7 7 2002 5.6 8 2002 5.8 9 2002 5.9 10 2002 6.3 11 2002 7.0 12 2002 8.30 1 2003 8.90 2 2003 8.60 3 2003 7.40 4 2003 6.80 5 2003 6.30 6 2003 5.90 7 2003 5.80 8 2003 5.90 9 2003 6.10 10 2003 6.50 11 2003 7.20 12 2003 8.70 1 2004 9.10 2 2004 8.80 3 2004 7.80 4 2004 7.10 5 2004 6.30 6 2004 5.90 7 2004 5.70 8 2004 5.90 9 2004 6.00 10 2004 6.50 11 2004 7.10 12 2004 8.60 1 2005 9.10 2 2005 8.90 3 2005 7.90 4 2005 7.10 5 2005 6.500 6 2005 6.100 7 2005 6.000 8 2005 6.200 9 2005 6.300 10 2005 6.800 11 2005 7.300 12 2005 8.700 1 2006 9.300 2 2006 8.900 3 2006 7.800 4 2006 6.700 5 2006 6.100 6 2006 5.600 7 2006 5.500 8 2006 5.600 9 2006 5.600 10 2006 6.100 11 2006 6.600 12 2006 7.900 1 2007 8.300 2 2007 7.800 3 2007 6.700 4 2007 6.200 5 2007 5.600 6 2007 5.200 7 2007 5.100 8 2007 5.300 9 2007 5.200 10 2007 5.700 11 2007 6.200 12 2007 7.400 1 2008 7.526 2 2008 6.827 3 2008 5.890 4 2008 5.751 5 2008 5.179 6 2008 4.799 7 2008 4.871 8 2008 5.068 9 2008 5.058 10 2008 5.614 11 2008 6.269 12 2008 7.910 1 2009 8.369 2 2009 8.380 3 2009 7.542 4 2009 7.289 5 2009 6.703 6 2009 6.394 7 2009 6.359 8 2009 6.576 9 2009 6.491 10 2009 6.845 11 2009 7.187 12 2009 8.660 1 2010 9.027 2 2010 8.731 3 2010 7.412 4 2010 6.986 5 2010 6.343 6 2010 5.910 7 2010 5.797 8 2010 5.980 9 2010 5.894 10 2010 6.259 11 2010 6.749 12 2010 8.290 1 2011 8.523 2 2011 8.040 3 2011 6.957 4 2011 6.536 5 2011 6.084 6 2011 5.683 7 2011 5.652 8 2011 5.897 9 2011 5.898 10 2011 6.377 11 2011 6.871 12 2011 8.219 1 2012 8.591 2 2012 8.376 3 2012 7.134 4 2012 6.838 5 2012 6.251 6 2012 5.933 7 2012 6.012 8 2012 6.164 9 2012 6.130