Year | Value | 2022 | 11.622 | 2021 | 11.675 | 2020 | 11.721 | 2019 | 11.76 | 2018 | 11.792 | 2017 | 11.817 | 2016 | 11.835 | 2015 | 11.846 | 2014 | 11.856 | 2013 | 11.867 | 2012 | 11.877 | 2011 | 11.892 | 2010 | 11.917 | 2009 | 11.943 | 2008 | 11.969 | 2007 | 11.994 | 2006 | 12.02 | 2005 | 12.046 | 2004 | 12.072 | 2003 | 12.098 | 2002 | 12.124 | 2001 | 12.15 | 2000 | 12.441 | 1999 | 12.738 | 1998 | 13.041 | 1997 | 13.35 | 1996 | 13.664 | 1995 | 13.986 | 1994 | 14.314 | 1993 | 14.648 | 1992 | 14.988 | 1991 | 15.336 | 1990 | 15.716 | 1989 | 16.167 | 1988 | 16.628 | 1987 | 17.1 | 1986 | 17.582 | 1985 | 18.075 | 1984 | 18.578 | 1983 | 19.093 | 1982 | 19.618 | 1981 | 20.18 | 1980 | 20.815 | 1979 | 21.467 | 1978 | 22.132 | 1977 | 22.811 | 1976 | 23.504 | 1975 | 24.214 | 1974 | 24.937 | 1973 | 25.675 | 1972 | 26.425 | 1971 | 27.236 | 1970 | 28.148 | 1969 | 29.08 | 1968 | 30.027 | 1967 | 30.995 | 1966 | 31.978 | 1965 | 32.978 | 1964 | 33.991 | 1963 | 35.023 | 1962 | 36.067 | 1961 | 37.125 | 1960 | 38.387 |
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