Year | Value | 2022 | 40,283 | 2021 | 36,437 | 2020 | 33,430 | 2019 | 31,153 | 2018 | 28,840 | 2017 | 26,968 | 2016 | 25,529 | 2015 | 24,144 | 2014 | 22,858 | 2013 | 22,070 | 2012 | 21,589 | 2011 | 21,462 | 2010 | 21,528 | 2009 | 21,659 | 2008 | 21,572 | 2007 | 21,165 | 2006 | 20,497 | 2005 | 19,704 | 2004 | 19,082 | 2003 | 18,904 | 2002 | 19,035 | 2001 | 19,208 | 2000 | 19,295 | 1999 | 19,098 | 1998 | 18,468 | 1997 | 17,604 | 1996 | 16,803 | 1995 | 16,208 | 1994 | 15,934 | 1993 | 15,987 | 1992 | 16,267 | 1991 | 16,633 | 1990 | 16,944 | 1989 | 17,170 | 1988 | 17,253 | 1987 | 17,145 | 1986 | 16,981 | 1985 | 16,886 | 1984 | 16,918 | 1983 | 17,163 | 1982 | 17,562 | 1981 | 17,953 | 1980 | 18,245 | 1979 | 18,378 | 1978 | 18,298 | 1977 | 18,081 | 1976 | 17,805 | 1975 | 17,459 | 1974 | 17,075 | 1973 | 16,676 | 1972 | 16,318 | 1971 | 16,148 | 1970 | 16,249 | 1969 | 16,532 | 1968 | 16,642 | 1967 | 16,327 | 1966 | 15,698 | 1965 | 15,027 | 1964 | 14,622 | 1963 | 14,585 | 1962 | 14,514 | 1961 | 14,126 | 1960 | 13,506 |
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