| Year | Value | | 2022 | 35,431 | | 2021 | 30,135 | | 2020 | 26,253 | | 2019 | 22,435 | | 2018 | 18,634 | | 2017 | 15,961 | | 2016 | 14,163 | | 2015 | 12,737 | | 2014 | 11,459 | | 2013 | 10,400 | | 2012 | 9,334 | | 2011 | 8,497 | | 2010 | 7,737 | | 2009 | 7,048 | | 2008 | 6,457 | | 2007 | 5,988 | | 2006 | 5,690 | | 2005 | 5,551 | | 2004 | 5,456 | | 2003 | 5,252 | | 2002 | 4,918 | | 2001 | 4,537 | | 2000 | 4,172 | | 1999 | 3,854 | | 1998 | 3,593 | | 1997 | 3,390 | | 1996 | 3,232 | | 1995 | 3,296 | | 1994 | 3,841 | | 1993 | 4,427 | | 1992 | 4,267 | | 1991 | 3,226 | | 1990 | 3,448 | | 1989 | 4,129 | | 1988 | 3,710 | | 1987 | 3,393 | | 1986 | 3,111 | | 1985 | 2,906 | | 1984 | 2,735 | | 1983 | 2,525 | | 1982 | 2,308 | | 1981 | 2,122 | | 1980 | 2,012 | | 1979 | 1,990 | | 1978 | 2,063 | | 1977 | 2,202 | | 1976 | 2,349 | | 1975 | 2,397 | | 1974 | 2,352 | | 1973 | 2,294 | | 1972 | 2,217 | | 1971 | 2,136 | | 1970 | 2,037 | | 1969 | 1,907 | | 1968 | 1,753 | | 1967 | 1,588 | | 1966 | 1,428 | | 1965 | 1,307 | | 1964 | 1,223 | | 1963 | 1,156 | | 1962 | 1,107 | | 1961 | 1,059 | | 1960 | 1,012 |
|