| Year | Value | | 2022 | 5,753 | | 2021 | 5,679 | | 2020 | 5,595 | | 2019 | 5,527 | | 2018 | 5,476 | | 2017 | 5,427 | | 2016 | 5,372 | | 2015 | 5,311 | | 2014 | 5,231 | | 2013 | 5,123 | | 2012 | 4,994 | | 2011 | 4,841 | | 2010 | 4,648 | | 2009 | 4,449 | | 2008 | 4,257 | | 2007 | 4,054 | | 2006 | 3,864 | | 2005 | 3,684 | | 2004 | 3,511 | | 2003 | 3,376 | | 2002 | 3,291 | | 2001 | 3,232 | | 2000 | 3,229 | | 1999 | 3,288 | | 1998 | 3,379 | | 1997 | 3,483 | | 1996 | 3,579 | | 1995 | 3,650 | | 1994 | 3,678 | | 1993 | 3,651 | | 1992 | 3,581 | | 1991 | 3,487 | | 1990 | 3,369 | | 1989 | 3,232 | | 1988 | 3,101 | | 1987 | 2,975 | | 1986 | 2,846 | | 1985 | 2,729 | | 1984 | 2,632 | | 1983 | 2,550 | | 1982 | 2,481 | | 1981 | 2,421 | | 1980 | 2,358 | | 1979 | 2,289 | | 1978 | 2,243 | | 1977 | 2,211 | | 1976 | 2,161 | | 1975 | 2,099 | | 1974 | 2,031 | | 1973 | 1,957 | | 1972 | 1,904 | | 1971 | 1,881 | | 1970 | 1,862 | | 1969 | 1,828 | | 1968 | 1,807 | | 1967 | 1,808 | | 1966 | 1,806 | | 1965 | 1,783 | | 1964 | 1,744 | | 1963 | 1,712 | | 1962 | 1,686 | | 1961 | 1,665 | | 1960 | 1,647 |
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