| Year | Value | | 2024 | 273,847 | | 2023 | 275,158 | | 2022 | 278,604 | | 2021 | 283,517 | | 2020 | 287,171 | | 2019 | 288,495 | | 2018 | 284,706 | | 2017 | 276,321 | | 2016 | 264,393 | | 2015 | 247,231 | | 2014 | 228,291 | | 2013 | 208,337 | | 2012 | 189,087 | | 2011 | 173,173 | | 2010 | 159,847 | | 2009 | 148,184 | | 2008 | 137,673 | | 2007 | 128,731 | | 2006 | 118,517 | | 2005 | 104,924 | | 2004 | 90,729 | | 2003 | 78,040 | | 2002 | 68,932 | | 2001 | 67,781 | | 2000 | 75,475 | | 1999 | 88,961 | | 1998 | 105,425 | | 1997 | 121,896 | | 1996 | 135,254 | | 1995 | 143,811 | | 1994 | 147,686 | | 1993 | 147,191 | | 1992 | 143,580 | | 1991 | 137,605 | | 1990 | 133,627 | | 1989 | 133,061 | | 1988 | 133,452 | | 1987 | 131,426 | | 1986 | 127,142 | | 1985 | 120,983 | | 1984 | 110,705 | | 1983 | 97,833 | | 1982 | 85,039 | | 1981 | 74,175 | | 1980 | 64,296 | | 1979 | 56,189 | | 1978 | 50,590 | | 1977 | 47,427 | | 1976 | 44,783 | | 1975 | 43,396 |
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