| Year | Value | | 2021 | 3,885 | | 2020 | 3,885 | | 2018 | 4,200 | | 2017 | 4,208 | | 2016 | 4,209 | | 2015 | 4,209 | | 2014 | 4,219 | | 2011 | 4,154 | | 2008 | 4,114 | | 2007 | 4,114 | | 2006 | 4,087 | | 2005 | 4,087 | | 2004 | 4,077 | | 2003 | 4,077 | | 2002 | 4,077 | | 2001 | 4,178 | | 2000 | 4,179 | | 1999 | 4,179 | | 1998 | 4,006 | | 1997 | 4,021 | | 1996 | 4,021 | | 1995 | 4,023 |
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