| Year | Value | | 2022 | 49,662 | | 2021 | 49,223 | | 2020 | 48,887 | | 2019 | 47,748 | | 2018 | 47,272 | | 2017 | 46,402 | | 2016 | 44,298 | | 2015 | 40,950 | | 2014 | 40,652 | | 2013 | 38,427 | | 2012 | 36,080 | | 2011 | 36,970 | | 2010 | 35,500 | | 2009 | 35,000 | | 2008 | 34,000 | | 2007 | 32,013 | | 2006 | 28,755 | | 2005 | 27,503 | | 2004 | 25,500 | | 2003 | 25,000 | | 2002 | 11,402 | | 2001 | 11,000 | | 2000 | 10,000 | | 1999 | 9,000 | | 1998 | 7,500 |
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