| Year | Value | | 2023 | 615,263 | | 2022 | 600,589 | | 2021 | 582,894 | | 2020 | 585,866 | | 2019 | 624,327 | | 2018 | 611,861 | | 2017 | 598,777 | | 2016 | 586,469 | | 2015 | 583,503 | | 2014 | 592,408 | | 2013 | 578,961 | | 2012 | 532,090 | | 2011 | 485,445 | | 2010 | 444,450 | | 2009 | 410,146 | | 2008 | 378,511 | | 2007 | 349,267 | | 2006 | 321,965 | | 2005 | 298,247 | | 2004 | 282,299 | | 2003 | 271,587 | | 2002 | 258,825 | | 2001 | 246,589 | | 2000 | 235,057 | | 1999 | 224,316 | | 1998 | 214,392 | | 1997 | 205,244 | | 1996 | 196,802 | | 1995 | 189,484 | | 1994 | 187,887 | | 1993 | 184,809 | | 1992 | 176,663 | | 1991 | 143,940 |
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