1 1957 12.568 2 1957 13.786 3 1957 13.169 4 1957 14.304 1 1958 13.253 2 1958 14.125 3 1958 13.245 4 1958 14.570 1 1959 13.346 2 1959 15.049 3 1959 14.109 4 1959 15.893 1 1960 14.911 2 1960 16.426 3 1960 15.598 4 1960 17.624 1 1961 15.958 2 1961 17.108 3 1961 16.137 4 1961 17.939 1 1962 16.450 2 1962 17.543 3 1962 16.671 4 1962 18.291 1 1963 16.713 2 1963 18.418 3 1963 17.444 4 1963 19.603 1 1964 18.361 2 1964 19.855 3 1964 18.694 4 1964 20.855 1 1965 19.262 2 1965 20.621 3 1965 19.670 4 1965 21.631 1 1966 20.103 2 1966 21.727 3 1966 20.142 4 1966 22.972 1 1967 20.285 2 1967 22.105 3 1967 20.186 4 1967 23.027 1 1968 21.129 2 1968 23.670 3 1968 22.396 4 1968 24.781 1 1969 23.599 2 1969 26.195 3 1969 24.912 4 1969 27.625 1 1970 25.901 2 1970 28.794 3 1970 26.833 4 1970 29.838 1 1971 28.242 2 1971 30.397 3 1971 27.953 4 1971 31.652 1 1972 29.348 2 1972 32.113 3 1972 30.033 4 1972 36.149 1 1973 31.259 2 1973 34.397 3 1973 31.973 4 1973 36.443 1 1974 34.113 2 1974 36.683 3 1974 33.519 4 1974 36.365 1 1975 32.491 2 1975 33.522 3 1975 30.697 4 1975 35.230 1 1976 32.663 2 1976 35.324 3 1976 33.347 4 1976 38.091 1 1977 34.865 2 1977 37.229 3 1977 34.178 4 1977 38.570 1 1978 35.297 2 1978 37.953 3 1978 35.355 4 1978 40.273 1 1979 37.417 2 1979 40.552 3 1979 38.466 4 1979 43.673 1 1980 40.236 2 1980 42.439 3 1980 38.117 4 1980 43.567 1 1981 39.401 2 1981 41.674 3 1981 37.729 4 1981 42.765 1 1982 39.942 2 1982 41.791 3 1982 37.459 4 1982 41.416 1 1983 38.245 2 1983 41.926 3 1983 38.700 4 1983 43.119 1 1984 40.591 2 1984 43.444 3 1984 40.578 4 1984 45.845 1 1985 43.038 2 1985 45.808 3 1985 42.361 4 1985 47.277 1 1986 44.108 2 1986 46.834 3 1986 42.124 4 1986 47.269 1 1987 43.585 2 1987 47.180 3 1987 42.499 4 1987 48.818 1 1988 45.074 2 1988 48.805 3 1988 45.121 4 1988 50.956 1 1989 47.644 2 1989 51.693 3 1989 47.238 4 1989 54.689 1 1990 52.187 2 1990 55.437 3 1990 50.344 4 1990 57.660 1 1991 53.768 2 1991 56.819 3 1991 51.185 4 1991 57.574 1 1992 53.643 2 1992 57.230 3 1992 50.018 4 1992 55.830 1 1993 52.674 2 1993 53.947 3 1993 49.891 4 1993 56.678 1 1994 53.432 2 1994 55.817 3 1994 52.062 4 1994 60.407 1 1995 57.093 2 1995 59.895 3 1995 55.165 4 1995 60.829 1 1996 56.071 2 1996 57.371 3 1996 56.971 4 1996 61.605 1 1997 58.672 2 1997 60.638 3 1997 60.672 4 1997 66.806 1 1998 63.539 2 1998 66.472 3 1998 65.839 4 1998 70.973 1 1999 65.606 2 1999 69.773 3 1999 68.906 4 1999 78.473 1 2000 71.206 2 2000 76.773 3 2000 76.440 4 2000 84.007 1 2001 77.540 2 2001 79.073 3 2001 78.040 4 2001 83.140 1 2002 76.306 2 2002 81.307 3 2002 78.340 4 2002 84.040 1 2003 79.273 2 2003 81.140 3 2003 80.140 4 2003 85.941 1 2004 81.507 2 2004 86.074 3 2004 86.507 4 2004 92.741 1 2005 84.940 2 2005 89.608 3 2005 89.474 4 2005 97.675 1 2006 91.908 2 2006 95.675 3 2006 96.841 4 2006 105.309 1 2007 98.775 2 2007 101.708 3 2007 101.908 4 2007 109.276 1 2008 103.542 2 2008 105.809 3 2008 104.542 4 2008 105.675 1 2009 91.474 2 2009 90.141 3 2009 91.241 4 2009 99.975 1 2010 91.974 2 2010 98.442 3 2010 100.975 4 2010 108.609 1 2011 101.175 2 2011 105.775 3 2011 105.475 4 2011 112.109 1 2012 101.942 2 2012 107.609 3 2012 107.209 4 2012 113.076 1 2013 102.309 2 2013 108.009 3 2013 107.509 4 2013 113.109 1 2014 104.509 2 2014 108.342 3 2014 106.376 4 2014 113.009 1 2015 105.842 2 2015 109.576 122"66"