| Year | Value | | 2022 | 3,045 | | 2021 | 3,074 | | 2020 | 3,129 | | 2019 | 3,202 | | 2018 | 3,277 | | 2017 | 3,343 | | 2016 | 3,395 | | 2015 | 3,423 | | 2014 | 3,420 | | 2013 | 3,389 | | 2012 | 3,327 | | 2011 | 3,225 | | 2010 | 3,081 | | 2009 | 2,911 | | 2008 | 2,739 | | 2007 | 2,567 | | 2006 | 2,412 | | 2005 | 2,286 | | 2004 | 2,184 | | 2003 | 2,091 | | 2002 | 1,996 | | 2001 | 1,908 | | 2000 | 1,825 | | 1999 | 1,736 | | 1998 | 1,657 | | 1997 | 1,600 | | 1996 | 1,563 | | 1995 | 1,539 | | 1994 | 1,528 | | 1993 | 1,517 | | 1992 | 1,498 | | 1991 | 1,466 | | 1990 | 1,460 | | 1989 | 1,495 | | 1988 | 1,539 | | 1987 | 1,584 | | 1986 | 1,632 | | 1985 | 1,676 | | 1984 | 1,706 | | 1983 | 1,724 | | 1982 | 1,737 | | 1981 | 1,744 | | 1980 | 1,750 | | 1979 | 1,758 | | 1978 | 1,760 | | 1977 | 1,752 | | 1976 | 1,743 | | 1975 | 1,736 | | 1974 | 1,731 | | 1973 | 1,727 | | 1972 | 1,726 | | 1971 | 1,723 | | 1970 | 1,717 | | 1969 | 1,710 | | 1968 | 1,711 | | 1967 | 1,721 | | 1966 | 1,738 | | 1965 | 1,765 | | 1964 | 1,796 | | 1963 | 1,825 | | 1962 | 1,845 | | 1961 | 1,850 | | 1960 | 1,834 |
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