| Year | Value | | 2023 | 233,608 | | 2022 | 231,368 | | 2021 | 222,391 | | 2020 | 219,015 | | 2019 | 220,983 | | 2018 | 217,130 | | 2017 | 213,259 | | 2016 | 209,633 | | 2015 | 203,751 | | 2014 | 198,891 | | 2013 | 192,997 | | 2012 | 189,063 | | 2011 | 187,550 | | 2010 | 188,369 | | 2009 | 188,716 | | 2008 | 192,115 | | 2007 | 189,725 | | 2006 | 183,451 | | 2005 | 175,622 | | 2004 | 173,541 | | 2003 | 173,624 | | 2002 | 170,967 | | 2001 | 171,255 | | 2000 | 169,444 | | 1999 | 164,408 | | 1998 | 159,420 | | 1997 | 154,357 | | 1996 | 154,551 | | 1995 | 155,613 | | 1994 | 149,400 | | 1993 | 147,715 | | 1992 | 147,743 | | 1991 | 144,742 |
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