| Year | Value | | 2024 | 77,095 | | 2023 | 75,114 | | 2022 | 71,334 | | 2021 | 67,649 | | 2020 | 63,961 | | 2019 | 59,914 | | 2018 | 57,323 | | 2017 | 56,122 | | 2016 | 54,617 | | 2015 | 53,043 | | 2014 | 51,499 | | 2013 | 50,065 | | 2012 | 48,931 | | 2011 | 48,233 | | 2010 | 47,918 | | 2009 | 47,965 | | 2008 | 48,498 | | 2007 | 49,525 | | 2006 | 50,912 | | 2005 | 52,610 | | 2004 | 54,630 | | 2003 | 56,723 | | 2002 | 58,362 | | 2001 | 58,309 | | 2000 | 56,464 | | 1999 | 53,714 | | 1998 | 50,186 | | 1997 | 46,158 | | 1996 | 43,210 | | 1995 | 41,572 | | 1994 | 40,065 | | 1993 | 38,784 | | 1992 | 37,745 | | 1991 | 37,153 | | 1990 | 36,787 | | 1989 | 37,722 | | 1988 | 39,780 | | 1987 | 41,000 | | 1986 | 41,282 | | 1985 | 41,150 | | 1984 | 38,850 | | 1983 | 34,702 | | 1982 | 31,675 | | 1981 | 29,775 | | 1980 | 28,230 | | 1979 | 26,862 | | 1978 | 25,712 | | 1977 | 24,660 | | 1976 | 23,718 | | 1975 | 22,946 |
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