| Year | Value | | 2023 | 191,313 | | 2022 | 187,810 | | 2021 | 185,306 | | 2020 | 180,368 | | 2019 | 179,456 | | 2018 | 176,995 | | 2017 | 174,767 | | 2016 | 172,612 | | 2015 | 170,432 | | 2014 | 168,778 | | 2013 | 167,307 | | 2012 | 166,031 | | 2011 | 164,900 | | 2010 | 163,889 | | 2009 | 162,745 | | 2008 | 161,257 | | 2007 | 159,191 | | 2006 | 156,782 | | 2005 | 154,492 | | 2004 | 152,145 | | 2003 | 149,603 | | 2002 | 146,830 | | 2001 | 143,704 | | 2000 | 140,293 | | 1999 | 136,593 | | 1998 | 132,742 | | 1997 | 128,701 | | 1996 | 124,594 | | 1995 | 120,595 | | 1994 | 120,979 | | 1993 | 121,887 | | 1992 | 117,592 | | 1991 | 112,021 |
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