| Year | Value | | 2023 | 482,488 | | 2022 | 485,114 | | 2021 | 482,787 | | 2020 | 474,324 | | 2019 | 472,872 | | 2018 | 475,623 | | 2017 | 476,029 | | 2016 | 461,637 | | 2015 | 462,290 | | 2014 | 466,354 | | 2013 | 461,161 | | 2012 | 467,375 | | 2011 | 468,254 | | 2010 | 476,881 | | 2009 | 479,419 | | 2008 | 475,843 | | 2007 | 474,062 | | 2006 | 471,041 | | 2005 | 466,283 | | 2004 | 461,407 | | 2003 | 439,056 | | 2002 | 447,414 | | 2001 | 450,222 | | 2000 | 445,114 | | 1999 | 442,169 | | 1998 | 456,602 | | 1997 | 446,953 | | 1996 | 435,360 | | 1995 | 433,397 | | 1994 | 431,194 | | 1993 | 429,861 | | 1992 | 429,159 | | 1991 | 427,810 |
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