| Year | Value | | 2021 | 4,000.5 | | 2019 | 4,020.25 | | 2018 | 4,016.25 | | 2017 | 4,016.25 | | 2016 | 3,843.17 | | 2015 | 3,799.94 | | 2014 | 3,799.94 | | 2012 | 4,175 | | 2011 | 4,226 | | 2010 | 3,664 | | 2009 | 4,723 | | 2008 | 3,572 | | 2007 | 3,572 | | 2006 | 3,572 | | 2005 | 3,572 | | 2004 | 3,572 | | 2003 | 3,572 | | 2002 | 3,572 | | 2001 | 3,572 | | 2000 | 3,973 | | 1999 | 3,973 | | 1998 | 4,272 | | 1997 | 4,219 | | 1996 | 4,219 | | 1995 | 4,290 |
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