| Year | Value | | 2022 | 29,674 | | 2021 | 27,888 | | 2020 | 25,503 | | 2019 | 22,621 | | 2018 | 19,279 | | 2017 | 16,300 | | 2016 | 13,649 | | 2015 | 11,311 | | 2014 | 9,274 | | 2013 | 7,532 | | 2012 | 6,066 | | 2011 | 4,814 | | 2010 | 3,704 | | 2009 | 3,361 | | 2008 | 3,847 | | 2007 | 4,450 | | 2006 | 4,958 | | 2005 | 5,192 | | 2004 | 5,213 | | 2003 | 5,180 | | 2002 | 5,103 | | 2001 | 4,973 | | 2000 | 4,810 | | 1999 | 4,657 | | 1998 | 4,558 | | 1997 | 4,530 | | 1996 | 4,551 | | 1995 | 4,487 | | 1994 | 4,305 | | 1993 | 4,119 | | 1992 | 3,958 | | 1991 | 3,822 | | 1990 | 3,686 | | 1989 | 3,536 | | 1988 | 3,366 | | 1987 | 3,184 | | 1986 | 3,015 | | 1985 | 2,893 | | 1984 | 2,796 | | 1983 | 2,671 | | 1982 | 2,483 | | 1981 | 2,239 | | 1980 | 2,133 | | 1979 | 2,166 | | 1978 | 2,112 | | 1977 | 1,917 | | 1976 | 1,634 | | 1975 | 1,408 | | 1974 | 1,319 | | 1973 | 1,298 | | 1972 | 1,266 | | 1971 | 1,189 | | 1970 | 1,050 | | 1969 | 878 | | 1968 | 726 | | 1967 | 660 | | 1966 | 655 | | 1965 | 650 | | 1964 | 649 | | 1963 | 651 | | 1962 | 652 | | 1961 | 655 | | 1960 | 659 |
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