| Year | Value | | 2023 | 429,536 | | 2022 | 425,882 | | 2021 | 414,677 | | 2020 | 400,715 | | 2019 | 385,513 | | 2018 | 357,395 | | 2017 | 352,124 | | 2016 | 347,144 | | 2015 | 342,466 | | 2014 | 334,024 | | 2013 | 342,591 | | 2012 | 332,058 | | 2011 | 341,235 | | 2010 | 338,303 | | 2009 | 338,969 | | 2008 | 331,983 | | 2007 | 324,869 | | 2006 | 317,730 | | 2005 | 309,596 | | 2004 | 298,501 | | 2003 | 286,324 | | 2002 | 274,716 | | 2001 | 263,739 | | 2000 | 253,413 | | 1999 | 243,606 | | 1998 | 235,334 | | 1997 | 228,967 | | 1996 | 223,397 | | 1995 | 217,976 | | 1994 | 214,781 | | 1993 | 214,202 | | 1992 | 224,272 | | 1991 | 233,241 |
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