| Year | Value | | 2022 | 10,852 | | 2021 | 10,394 | | 2020 | 9,935 | | 2019 | 9,251 | | 2018 | 8,781 | | 2017 | 9,329 | | 2016 | 10,667 | | 2015 | 11,484 | | 2014 | 12,561 | | 2013 | 13,501 | | 2012 | 13,199 | | 2011 | 12,627 | | 2010 | 11,583 | | 2009 | 10,605 | | 2008 | 9,931 | | 2007 | 9,153 | | 2006 | 8,355 | | 2005 | 7,602 | | 2004 | 6,927 | | 2003 | 6,340 | | 2002 | 5,831 | | 2001 | 5,363 | | 2000 | 4,909 | | 1999 | 4,466 | | 1998 | 4,232 | | 1997 | 4,057 | | 1996 | 3,819 | | 1995 | 3,666 | | 1994 | 3,473 | | 1993 | 3,338 | | 1992 | 3,299 | | 1991 | 3,216 | | 1990 | 3,092 | | 1989 | 3,038 | | 1988 | 3,332 | | 1987 | 3,626 | | 1986 | 3,575 | | 1985 | 3,461 | | 1984 | 3,358 | | 1983 | 3,247 | | 1982 | 3,116 | | 1981 | 2,986 | | 1980 | 2,869 | | 1979 | 2,766 | | 1978 | 2,681 | | 1977 | 2,609 | | 1976 | 2,542 | | 1975 | 2,477 | | 1974 | 2,409 | | 1973 | 2,337 | | 1972 | 2,291 | | 1971 | 2,279 | | 1970 | 2,316 | | 1969 | 2,404 | | 1968 | 2,496 | | 1967 | 2,593 | | 1966 | 2,704 | | 1965 | 2,794 | | 1964 | 2,826 | | 1963 | 2,869 | | 1962 | 2,930 | | 1961 | 2,974 | | 1960 | 3,027 |
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