| Year | Value | | 2021 | 5,474 | | 2020 | 5,453.5 | | 2019 | 5,459.2 | | 2018 | 5,459 | | 2017 | 5,459 | | 2016 | 5,459 | | 2015 | 5,470 | | 2014 | 5,470 | | 2013 | 5,469 | | 2012 | 5,462 | | 2011 | 5,482 | | 2010 | 5,482 | | 2009 | 5,491 | | 2008 | 5,491 | | 2007 | 5,494 | | 2006 | 5,494 | | 2005 | 5,498 | | 2004 | 5,498 | | 2003 | 5,502 | | 2002 | 5,512 | | 2001 | 5,509 | | 2000 | 5,512 | | 1999 | 5,523 | | 1998 | 5,531 | | 1997 | 5,542 | | 1996 | 5,547 | | 1995 | 5,543 |
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