| Year | Value | | 2023 | 393,592 | | 2022 | 378,136 | | 2021 | 364,281 | | 2020 | 352,130 | | 2019 | 344,636 | | 2018 | 333,561 | | 2017 | 322,992 | | 2016 | 316,068 | | 2015 | 309,383 | | 2014 | 302,919 | | 2013 | 296,647 | | 2012 | 290,380 | | 2011 | 282,783 | | 2010 | 275,216 | | 2009 | 267,627 | | 2008 | 260,013 | | 2007 | 253,060 | | 2006 | 246,968 | | 2005 | 241,152 | | 2004 | 235,530 | | 2003 | 230,119 | | 2002 | 224,896 | | 2001 | 219,874 | | 2000 | 214,518 | | 1999 | 205,517 | | 1998 | 197,185 | | 1997 | 189,525 | | 1996 | 183,425 | | 1995 | 178,493 | | 1994 | 171,830 | | 1993 | 163,755 | | 1992 | 154,325 | | 1991 | 145,782 |
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