| Year | Value | | 2023 | 692,875 | | 2022 | 684,941 | | 2021 | 667,244 | | 2020 | 652,883 | | 2019 | 650,331 | | 2018 | 639,464 | | 2017 | 625,955 | | 2016 | 616,189 | | 2015 | 621,262 | | 2014 | 630,237 | | 2013 | 620,095 | | 2012 | 615,106 | | 2011 | 609,156 | | 2010 | 603,570 | | 2009 | 585,771 | | 2008 | 575,504 | | 2007 | 562,628 | | 2006 | 541,559 | | 2005 | 525,959 | | 2004 | 510,413 | | 2003 | 499,677 | | 2002 | 478,400 | | 2001 | 466,314 | | 2000 | 443,417 | | 1999 | 431,657 | | 1998 | 420,076 | | 1997 | 408,806 | | 1996 | 397,997 | | 1995 | 387,859 | | 1994 | 378,547 | | 1993 | 370,198 | | 1992 | 363,014 | | 1991 | 359,631 |
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