| Year | Value | | 2024 | 283,213 | | 2023 | 286,417 | | 2022 | 295,325 | | 2021 | 307,506 | | 2020 | 320,082 | | 2019 | 331,203 | | 2018 | 339,345 | | 2017 | 344,088 | | 2016 | 346,221 | | 2015 | 346,659 | | 2014 | 346,582 | | 2013 | 347,699 | | 2012 | 352,142 | | 2011 | 360,747 | | 2010 | 374,012 | | 2009 | 390,490 | | 2008 | 405,443 | | 2007 | 414,469 | | 2006 | 416,600 | | 2005 | 413,661 | | 2004 | 407,213 | | 2003 | 399,058 | | 2002 | 389,736 | | 2001 | 377,158 | | 2000 | 361,596 | | 1999 | 347,196 | | 1998 | 337,642 | | 1997 | 336,138 | | 1996 | 347,427 | | 1995 | 370,246 | | 1994 | 399,824 | | 1993 | 433,728 | | 1992 | 468,968 | | 1991 | 502,386 | | 1990 | 530,241 | | 1989 | 550,456 | | 1988 | 563,372 | | 1987 | 570,899 | | 1986 | 575,740 | | 1985 | 580,107 | | 1984 | 583,987 | | 1983 | 585,218 | | 1982 | 580,891 | | 1981 | 568,370 | | 1980 | 547,183 | | 1979 | 519,953 | | 1978 | 490,512 | | 1977 | 463,140 | | 1976 | 441,455 | | 1975 | 426,391 |
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