| Year | Value | | 2023 | 406,588 | | 2022 | 401,157 | | 2021 | 399,806 | | 2020 | 390,747 | | 2019 | 395,161 | | 2018 | 391,158 | | 2017 | 384,274 | | 2016 | 379,880 | | 2015 | 378,525 | | 2014 | 374,705 | | 2013 | 365,781 | | 2012 | 359,270 | | 2011 | 352,684 | | 2010 | 338,660 | | 2009 | 327,792 | | 2008 | 315,892 | | 2007 | 299,524 | | 2006 | 276,694 | | 2005 | 258,031 | | 2004 | 242,717 | | 2003 | 228,595 | | 2002 | 227,477 | | 2001 | 221,348 | | 2000 | 216,467 | | 1999 | 211,178 | | 1998 | 205,902 | | 1997 | 202,411 | | 1996 | 194,239 | | 1995 | 186,099 | | 1994 | 177,844 | | 1993 | 169,424 | | 1992 | 160,739 | | 1991 | 156,221 |
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