| Year | Value | | 2023 | 596,825 | | 2022 | 580,820 | | 2021 | 562,445 | | 2020 | 550,988 | | 2019 | 542,209 | | 2018 | 534,219 | | 2017 | 520,019 | | 2016 | 505,198 | | 2015 | 493,404 | | 2014 | 480,394 | | 2013 | 466,912 | | 2012 | 453,650 | | 2011 | 442,441 | | 2010 | 431,707 | | 2009 | 422,042 | | 2008 | 412,412 | | 2007 | 403,147 | | 2006 | 393,652 | | 2005 | 380,380 | | 2004 | 370,497 | | 2003 | 362,305 | | 2002 | 354,705 | | 2001 | 346,221 | | 2000 | 343,816 | | 1999 | 341,748 | | 1998 | 326,065 | | 1997 | 320,237 | | 1996 | 315,940 | | 1995 | 313,143 | | 1994 | 310,274 | | 1993 | 307,634 | | 1992 | 305,667 | | 1991 | 303,716 |
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