| Year | Value | | 2021 | 880.46733608122 | | 2020 | 930.44696454719 | | 2019 | 994.99549878602 | | 2018 | 1,070.4781849854 | | 2017 | 959.40818895997 | | 2016 | 886.19537720544 | | 2015 | 849.25450184268 | | 2014 | 980.42230645209 | | 2013 | 978.78165098469 | | 2012 | 990.44325366634 | | 2011 | 823.62586305895 | | 2010 | 674.24328014702 | | 2009 | 725.10108817502 | | 2008 | 803.81714234011 | | 2007 | 644.47510251104 | | 2006 | 477.43146826412 | | 2005 | 403.03178187431 | | 2004 | 358.88203543735 | | 2003 | 318.48811907826 | | 2002 | 261.42150613627 | | 2001 | 252.5695616578 | | 2000 | 218.42923445024 | | 1999 | 203.23969448761 | | 1998 | 275.38674333488 | | 1997 | 311.54049520584 |
|