| Year | Value | | 2022 | 41,931 | | 2021 | 43,136 | | 2020 | 43,173 | | 2019 | 42,203 | | 2018 | 40,117 | | 2017 | 37,254 | | 2016 | 34,011 | | 2015 | 30,693 | | 2014 | 27,455 | | 2013 | 24,329 | | 2012 | 21,445 | | 2011 | 18,893 | | 2010 | 16,671 | | 2009 | 14,833 | | 2008 | 13,358 | | 2007 | 12,150 | | 2006 | 11,202 | | 2005 | 10,668 | | 2004 | 10,413 | | 2003 | 10,188 | | 2002 | 9,977 | | 2001 | 9,761 | | 2000 | 9,527 | | 1999 | 9,273 | | 1998 | 9,011 | | 1997 | 8,755 | | 1996 | 8,499 | | 1995 | 8,227 | | 1994 | 7,942 | | 1993 | 7,624 | | 1992 | 7,265 | | 1991 | 6,889 | | 1990 | 6,527 | | 1989 | 6,199 | | 1988 | 5,867 | | 1987 | 5,521 | | 1986 | 5,196 | | 1985 | 4,919 | | 1984 | 4,726 | | 1983 | 4,614 | | 1982 | 4,547 | | 1981 | 4,511 | | 1980 | 4,495 | | 1979 | 4,494 | | 1978 | 4,501 | | 1977 | 4,480 | | 1976 | 4,444 | | 1975 | 4,430 | | 1974 | 4,421 | | 1973 | 4,411 | | 1972 | 4,410 | | 1971 | 4,415 | | 1970 | 4,420 | | 1969 | 4,422 | | 1968 | 4,419 | | 1967 | 4,410 | | 1966 | 4,368 | | 1965 | 4,250 | | 1964 | 4,109 | | 1963 | 3,974 | | 1962 | 3,825 | | 1961 | 3,688 | | 1960 | 3,572 |
|