| Year | Value | | 2024 | 74,276 | | 2023 | 70,714 | | 2022 | 73,536 | | 2021 | 71,914 | | 2020 | 79,809 | | 2019 | 72,066 | | 2018 | 68,733 | | 2017 | 68,043 | | 2016 | 66,385 | | 2015 | 62,880 | | 2014 | 59,189 | | 2013 | 54,789 | | 2012 | 49,777 | | 2011 | 45,950 | | 2010 | 44,502 | | 2009 | 44,427 | | 2008 | 40,550 | | 2007 | 37,341 | | 2006 | 35,944 | | 2005 | 34,023 | | 2004 | 31,809 | | 2003 | 30,972 | | 2002 | 30,030 | | 2001 | 28,995 | | 2000 | 28,019 | | 1999 | 27,225 | | 1998 | 26,669 | | 1997 | 26,416 | | 1996 | 26,445 | | 1995 | 26,459 | | 1994 | 26,256 | | 1993 | 25,896 | | 1992 | 25,426 | | 1991 | 24,876 | | 1990 | 24,202 | | 1989 | 23,466 | | 1988 | 22,832 | | 1987 | 22,354 | | 1986 | 22,010 | | 1985 | 21,719 | | 1984 | 21,287 | | 1983 | 20,579 | | 1982 | 19,657 | | 1981 | 18,655 | | 1980 | 17,673 | | 1979 | 16,765 | | 1978 | 15,949 | | 1977 | 15,223 | | 1976 | 14,582 | | 1975 | 14,012 |
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