| Year | Value | | 2022 | 16,783 | | 2021 | 16,278 | | 2020 | 15,696 | | 2019 | 15,079 | | 2018 | 14,490 | | 2017 | 13,946 | | 2016 | 13,461 | | 2015 | 12,997 | | 2014 | 12,564 | | 2013 | 12,133 | | 2012 | 11,685 | | 2011 | 11,239 | | 2010 | 10,786 | | 2009 | 10,338 | | 2008 | 9,868 | | 2007 | 9,399 | | 2006 | 9,000 | | 2005 | 8,634 | | 2004 | 8,270 | | 2003 | 7,863 | | 2002 | 7,478 | | 2001 | 7,137 | | 2000 | 6,834 | | 1999 | 6,616 | | 1998 | 6,397 | | 1997 | 6,166 | | 1996 | 5,962 | | 1995 | 5,647 | | 1994 | 5,327 | | 1993 | 5,096 | | 1992 | 4,875 | | 1991 | 5,081 | | 1990 | 5,273 | | 1989 | 5,082 | | 1988 | 4,892 | | 1987 | 4,702 | | 1986 | 4,527 | | 1985 | 4,368 | | 1984 | 4,224 | | 1983 | 4,094 | | 1982 | 3,978 | | 1981 | 3,870 | | 1980 | 3,768 | | 1979 | 3,667 | | 1978 | 3,572 | | 1977 | 3,482 | | 1976 | 3,396 | | 1975 | 3,319 | | 1974 | 3,246 | | 1973 | 3,180 | | 1972 | 3,119 | | 1971 | 3,064 | | 1970 | 3,019 | | 1969 | 2,983 | | 1968 | 2,954 | | 1967 | 2,928 | | 1966 | 2,899 | | 1965 | 2,867 | | 1964 | 2,832 | | 1963 | 2,791 | | 1962 | 2,749 | | 1961 | 2,709 | | 1960 | 2,672 |
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