| Year | Value | | 2022 | 14,779 | | 2021 | 14,307 | | 2020 | 13,871 | | 2019 | 13,409 | | 2018 | 12,913 | | 2017 | 12,448 | | 2016 | 12,017 | | 2015 | 11,628 | | 2014 | 11,283 | | 2013 | 10,973 | | 2012 | 10,687 | | 2011 | 10,408 | | 2010 | 10,126 | | 2009 | 9,848 | | 2008 | 9,547 | | 2007 | 9,213 | | 2006 | 8,884 | | 2005 | 8,581 | | 2004 | 8,319 | | 2003 | 8,081 | | 2002 | 7,830 | | 2001 | 7,563 | | 2000 | 7,258 | | 1999 | 6,891 | | 1998 | 6,489 | | 1997 | 6,079 | | 1996 | 5,696 | | 1995 | 5,378 | | 1994 | 5,139 | | 1993 | 4,975 | | 1992 | 4,859 | | 1991 | 4,695 | | 1990 | 4,464 | | 1989 | 4,242 | | 1988 | 4,022 | | 1987 | 3,777 | | 1986 | 3,516 | | 1985 | 3,269 | | 1984 | 3,040 | | 1983 | 2,848 | | 1982 | 2,714 | | 1981 | 2,634 | | 1980 | 2,602 | | 1979 | 2,617 | | 1978 | 2,652 | | 1977 | 2,676 | | 1976 | 2,675 | | 1975 | 2,651 | | 1974 | 2,621 | | 1973 | 2,598 | | 1972 | 2,583 | | 1971 | 2,579 | | 1970 | 2,581 | | 1969 | 2,585 | | 1968 | 2,585 | | 1967 | 2,576 | | 1966 | 2,549 | | 1965 | 2,510 | | 1964 | 2,466 | | 1963 | 2,415 | | 1962 | 2,359 | | 1961 | 2,306 | | 1960 | 2,254 |
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