| Year | Value | | 2021 | 17,386.339380148 | | 2020 | 15,875.115630502 | | 2019 | 15,653.308224124 | | 2018 | 15,891.483956288 | | 2017 | 14,248.591605647 | | 2016 | 13,276.437402719 | | 2015 | 13,194.827095877 | | 2014 | 15,227.836609285 | | 2013 | 14,882.058561096 | | 2012 | 14,119.20977086 | | 2011 | 14,577.732431026 | | 2010 | 13,479.617100083 | | 2009 | 13,282.12920907 | | 2008 | 15,012.361677663 | | 2007 | 12,715.450666748 | | 2006 | 10,211.908915152 | | 2005 | 8,920.3007438689 | | 2004 | 7,850.2553445283 | | 2003 | 6,144.1115525255 | | 2002 | 4,841.7054713367 | | 2001 | 4,168.8962898308 | | 2000 | 3,834.7268541427 | | 1999 | 4,009.0890053826 | | 1998 | 3,940.0233811848 | | 1997 | 3,588.4954046572 | | 1996 | 3,556.0553262909 | | 1995 | 3,154.6268213791 |
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