Year | Value | 2023 | 15,756 | 2022 | 15,469 | 2021 | 15,135 | 2020 | 14,892 | 2019 | 14,867 | 2018 | 14,768 | 2017 | 14,735 | 2016 | 14,720 | 2015 | 14,719 | 2014 | 14,746 | 2013 | 14,787 | 2012 | 14,821 | 2011 | 14,800 | 2010 | 14,706 | 2009 | 14,606 | 2008 | 14,511 | 2007 | 14,410 | 2006 | 14,351 | 2005 | 14,332 | 2004 | 14,311 | 2003 | 14,288 | 2002 | 14,258 | 2001 | 14,202 | 2000 | 14,116 | 1999 | 14,001 | 1998 | 13,862 | 1997 | 13,705 | 1996 | 13,612 | 1995 | 13,602 | 1994 | 13,597 | 1993 | 12,843 | 1992 | 12,103 | 1991 | 11,374 |
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