| Year | Value | | 2022 | 2,328 | | 2021 | 2,365 | | 2020 | 2,440 | | 2019 | 2,528 | | 2018 | 2,598 | | 2017 | 2,652 | | 2016 | 2,693 | | 2015 | 2,694 | | 2014 | 2,651 | | 2013 | 2,553 | | 2012 | 2,458 | | 2011 | 2,358 | | 2010 | 2,238 | | 2009 | 2,148 | | 2008 | 2,082 | | 2007 | 2,028 | | 2006 | 1,967 | | 2005 | 1,917 | | 2004 | 1,877 | | 2003 | 1,841 | | 2002 | 1,811 | | 2001 | 1,782 | | 2000 | 1,743 | | 1999 | 1,699 | | 1998 | 1,661 | | 1997 | 1,635 | | 1996 | 1,631 | | 1995 | 1,647 | | 1994 | 1,660 | | 1993 | 1,659 | | 1992 | 1,648 | | 1991 | 1,642 | | 1990 | 1,648 | | 1989 | 1,665 | | 1988 | 1,688 | | 1987 | 1,701 | | 1986 | 1,712 | | 1985 | 1,734 | | 1984 | 1,756 | | 1983 | 1,776 | | 1982 | 1,792 | | 1981 | 1,806 | | 1980 | 1,815 | | 1979 | 1,814 | | 1978 | 1,807 | | 1977 | 1,795 | | 1976 | 1,773 | | 1975 | 1,745 | | 1974 | 1,716 | | 1973 | 1,685 | | 1972 | 1,656 | | 1971 | 1,626 | | 1970 | 1,592 | | 1969 | 1,554 | | 1968 | 1,514 | | 1967 | 1,469 | | 1966 | 1,415 | | 1965 | 1,358 | | 1964 | 1,304 | | 1963 | 1,253 | | 1962 | 1,204 | | 1961 | 1,160 | | 1960 | 1,118 |
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