| Year | Value | | 2022 | 11,255 | | 2021 | 11,088 | | 2020 | 10,733 | | 2019 | 10,229 | | 2018 | 9,734 | | 2017 | 9,284 | | 2016 | 8,893 | | 2015 | 8,565 | | 2014 | 8,281 | | 2013 | 8,030 | | 2012 | 7,808 | | 2011 | 7,600 | | 2010 | 7,400 | | 2009 | 7,227 | | 2008 | 7,098 | | 2007 | 6,995 | | 2006 | 6,896 | | 2005 | 6,792 | | 2004 | 6,681 | | 2003 | 6,542 | | 2002 | 6,384 | | 2001 | 6,254 | | 2000 | 6,161 | | 1999 | 6,088 | | 1998 | 6,049 | | 1997 | 6,044 | | 1996 | 6,023 | | 1995 | 5,971 | | 1994 | 5,898 | | 1993 | 5,805 | | 1992 | 5,690 | | 1991 | 5,569 | | 1990 | 5,440 | | 1989 | 5,297 | | 1988 | 5,144 | | 1987 | 4,989 | | 1986 | 4,840 | | 1985 | 4,708 | | 1984 | 4,595 | | 1983 | 4,506 | | 1982 | 4,426 | | 1981 | 4,334 | | 1980 | 4,219 | | 1979 | 4,087 | | 1978 | 3,940 | | 1977 | 3,778 | | 1976 | 3,622 | | 1975 | 3,482 | | 1974 | 3,354 | | 1973 | 3,235 | | 1972 | 3,130 | | 1971 | 3,043 | | 1970 | 2,977 | | 1969 | 2,935 | | 1968 | 2,919 | | 1967 | 2,923 | | 1966 | 2,921 | | 1965 | 2,902 | | 1964 | 2,863 | | 1963 | 2,800 | | 1962 | 2,718 | | 1961 | 2,633 | | 1960 | 2,558 |
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