| Year | Value | | 2023 | 488,470 | | 2022 | 476,609 | | 2021 | 467,373 | | 2020 | 452,089 | | 2019 | 454,349 | | 2018 | 446,414 | | 2017 | 438,853 | | 2016 | 431,259 | | 2015 | 429,540 | | 2014 | 427,540 | | 2013 | 429,139 | | 2012 | 381,488 | | 2011 | 370,891 | | 2010 | 360,416 | | 2009 | 349,697 | | 2008 | 338,824 | | 2007 | 328,040 | | 2006 | 317,447 | | 2005 | 307,166 | | 2004 | 297,589 | | 2003 | 288,773 | | 2002 | 280,101 | | 2001 | 271,243 | | 2000 | 262,227 | | 1999 | 255,094 | | 1998 | 248,017 | | 1997 | 241,017 | | 1996 | 236,848 | | 1995 | 232,338 | | 1994 | 227,600 | | 1993 | 220,272 | | 1992 | 213,060 | | 1991 | 206,215 |
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