| Year | Value | | 2023 | 592,618 | | 2022 | 571,718 | | 2021 | 535,701 | | 2020 | 516,539 | | 2019 | 527,542 | | 2018 | 510,441 | | 2017 | 493,923 | | 2016 | 477,565 | | 2015 | 460,736 | | 2014 | 443,914 | | 2013 | 426,879 | | 2012 | 409,858 | | 2011 | 392,909 | | 2010 | 375,633 | | 2009 | 358,332 | | 2008 | 341,184 | | 2007 | 324,337 | | 2006 | 307,875 | | 2005 | 291,795 | | 2004 | 276,049 | | 2003 | 261,171 | | 2002 | 247,359 | | 2001 | 234,736 | | 2000 | 223,290 | | 1999 | 213,605 | | 1998 | 205,498 | | 1997 | 198,125 | | 1996 | 191,225 | | 1995 | 184,705 | | 1994 | 178,543 | | 1993 | 172,717 | | 1992 | 167,151 | | 1991 | 161,843 |
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