| Year | Value | | 2023 | 47,240 | | 2022 | 47,516 | | 2021 | 47,566 | | 2020 | 45,806 | | 2019 | 47,693 | | 2018 | 47,068 | | 2017 | 46,530 | | 2016 | 45,814 | | 2015 | 45,043 | | 2014 | 44,241 | | 2013 | 43,448 | | 2012 | 43,667 | | 2011 | 41,135 | | 2010 | 39,872 | | 2009 | 38,691 | | 2008 | 37,629 | | 2007 | 36,575 | | 2006 | 35,518 | | 2005 | 34,461 | | 2004 | 33,408 | | 2003 | 32,356 | | 2002 | 31,296 | | 2001 | 30,247 | | 2000 | 29,410 | | 1999 | 28,591 | | 1998 | 27,761 | | 1997 | 26,930 | | 1996 | 26,097 | | 1995 | 25,253 | | 1994 | 24,390 | | 1993 | 23,503 | | 1992 | 22,590 | | 1991 | 21,765 |
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