| Year | Value | | 2022 | 63,152 | | 2021 | 61,257 | | 2020 | 59,200 | | 2019 | 56,964 | | 2018 | 54,610 | | 2017 | 52,195 | | 2016 | 50,032 | | 2015 | 47,755 | | 2014 | 45,503 | | 2013 | 43,280 | | 2012 | 41,129 | | 2011 | 39,092 | | 2010 | 37,226 | | 2009 | 35,446 | | 2008 | 33,805 | | 2007 | 32,515 | | 2006 | 31,538 | | 2005 | 30,556 | | 2004 | 29,638 | | 2003 | 28,737 | | 2002 | 27,612 | | 2001 | 26,429 | | 2000 | 25,426 | | 1999 | 24,548 | | 1998 | 23,776 | | 1997 | 23,185 | | 1996 | 22,246 | | 1995 | 21,295 | | 1994 | 20,345 | | 1993 | 19,377 | | 1992 | 18,377 | | 1991 | 17,400 | | 1990 | 16,463 |
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