| Year | Value | | 2022 | 6,237 | | 2021 | 6,027 | | 2020 | 5,838 | | 2019 | 5,691 | | 2018 | 5,552 | | 2017 | 5,402 | | 2016 | 5,276 | | 2015 | 5,189 | | 2014 | 5,134 | | 2013 | 5,049 | | 2012 | 4,945 | | 2011 | 4,813 | | 2010 | 4,658 | | 2009 | 4,515 | | 2008 | 4,370 | | 2007 | 4,191 | | 2006 | 4,008 | | 2005 | 3,898 | | 2004 | 3,800 | | 2003 | 3,654 | | 2002 | 3,506 | | 2001 | 3,353 | | 2000 | 3,201 | | 1999 | 3,059 | | 1998 | 2,933 | | 1997 | 2,821 | | 1996 | 2,717 | | 1995 | 2,621 | | 1994 | 2,529 | | 1993 | 2,432 | | 1992 | 2,339 | | 1991 | 2,250 | | 1990 | 2,157 | | 1989 | 2,066 | | 1988 | 1,975 | | 1987 | 1,875 | | 1986 | 1,782 | | 1985 | 1,703 | | 1984 | 1,635 | | 1983 | 1,586 | | 1982 | 1,558 | | 1981 | 1,549 | | 1980 | 1,557 | | 1979 | 1,584 | | 1978 | 1,618 | | 1977 | 1,636 | | 1976 | 1,629 | | 1975 | 1,617 | | 1974 | 1,599 | | 1973 | 1,554 | | 1972 | 1,489 | | 1971 | 1,392 | | 1970 | 1,277 | | 1969 | 1,198 | | 1968 | 1,168 | | 1967 | 1,127 | | 1966 | 1,081 | | 1965 | 1,038 | | 1964 | 1,003 | | 1963 | 963 | | 1962 | 925 | | 1961 | 896 | | 1960 | 872 |
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