Year | Value | 2022 | 10.738 | 2021 | 10.907 | 2020 | 11.075 | 2019 | 11.242 | 2018 | 11.407 | 2017 | 11.571 | 2016 | 11.734 | 2015 | 11.894 | 2014 | 12.053 | 2013 | 12.21 | 2012 | 12.364 | 2011 | 12.516 | 2010 | 12.666 | 2009 | 12.813 | 2008 | 12.958 | 2007 | 13.099 | 2006 | 13.238 | 2005 | 13.373 | 2004 | 13.506 | 2003 | 13.634 | 2002 | 13.76 | 2001 | 13.882 | 2000 | 14 | 1999 | 14.115 | 1998 | 14.23 | 1997 | 14.541 | 1996 | 14.858 | 1995 | 15.18 | 1994 | 15.509 | 1993 | 15.843 | 1992 | 16.182 | 1991 | 16.528 | 1990 | 16.88 | 1989 | 17.237 | 1988 | 17.6 | 1987 | 18.554 | 1986 | 19.546 | 1985 | 20.578 | 1984 | 21.647 | 1983 | 22.76 | 1982 | 23.911 | 1981 | 25.101 | 1980 | 26.328 | 1979 | 27.597 | 1978 | 28.901 | 1977 | 30.241 | 1976 | 31.613 | 1975 | 33.022 | 1974 | 34.46 | 1973 | 35.928 | 1972 | 37.42 | 1971 | 38.94 | 1970 | 40.525 | 1969 | 42.204 | 1968 | 43.899 | 1967 | 45.614 | 1966 | 47.336 | 1965 | 49.065 | 1964 | 50.793 | 1963 | 52.525 | 1962 | 54.248 | 1961 | 55.961 | 1960 | 57.657 |
|