| Year | Value | | 2022 | 27,063 | | 2021 | 27,053 | | 2020 | 25,844 | | 2019 | 23,555 | | 2018 | 22,107 | | 2017 | 21,273 | | 2016 | 20,287 | | 2015 | 19,181 | | 2014 | 18,185 | | 2013 | 17,075 | | 2012 | 15,610 | | 2011 | 13,979 | | 2010 | 12,581 | | 2009 | 12,028 | | 2008 | 12,091 | | 2007 | 11,988 | | 2006 | 11,653 | | 2005 | 11,126 | | 2004 | 10,525 | | 2003 | 10,148 | | 2002 | 10,022 | | 2001 | 9,920 | | 2000 | 9,821 | | 1999 | 9,731 | | 1998 | 9,633 | | 1997 | 9,518 | | 1996 | 9,397 | | 1995 | 9,280 | | 1994 | 9,167 | | 1993 | 9,089 | | 1992 | 9,045 | | 1991 | 9,000 | | 1990 | 8,941 | | 1989 | 8,868 | | 1988 | 8,781 | | 1987 | 8,681 | | 1986 | 8,575 | | 1985 | 8,465 | | 1984 | 8,281 | | 1983 | 8,033 | | 1982 | 7,800 | | 1981 | 7,576 | | 1980 | 7,357 | | 1979 | 7,145 | | 1978 | 6,935 | | 1977 | 6,729 | | 1976 | 6,535 | | 1975 | 6,355 | | 1974 | 6,180 | | 1973 | 6,021 | | 1972 | 5,879 | | 1971 | 5,738 | | 1970 | 5,598 | | 1969 | 5,461 | | 1968 | 5,328 | | 1967 | 5,198 | | 1966 | 5,063 | | 1965 | 4,919 | | 1964 | 4,766 | | 1963 | 4,603 | | 1962 | 4,435 | | 1961 | 4,278 | | 1960 | 4,145 |
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