| Year | Value | | 2023 | 60,139 | | 2022 | 59,431 | | 2021 | 58,624 | | 2020 | 57,224 | | 2019 | 56,989 | | 2018 | 56,152 | | 2017 | 55,281 | | 2016 | 54,437 | | 2015 | 53,634 | | 2014 | 52,859 | | 2013 | 52,216 | | 2012 | 51,681 | | 2011 | 50,759 | | 2010 | 49,817 | | 2009 | 48,848 | | 2008 | 47,793 | | 2007 | 46,663 | | 2006 | 45,822 | | 2005 | 44,788 | | 2004 | 43,688 | | 2003 | 42,553 | | 2002 | 41,407 | | 2001 | 40,319 | | 2000 | 39,216 | | 1999 | 38,125 | | 1998 | 37,087 | | 1997 | 36,093 | | 1996 | 35,179 | | 1995 | 34,336 | | 1994 | 33,569 | | 1993 | 32,850 | | 1992 | 32,169 | | 1991 | 31,464 |
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