| Year | Value | | 2021 | 3,458.2931309253 | | 2020 | 3,555.963451155 | | 2019 | 3,785.6839244393 | | 2018 | 3,705.1978034214 | | 2017 | 3,761.767774622 | | 2016 | 3,644.100024559 | | 2015 | 3,598.8526744111 | | 2014 | 3,454.6942471521 | | 2013 | 3,518.0588337446 | | 2012 | 3,441.2088077479 | | 2011 | 3,313.8369809599 | | 2010 | 3,070.7616021535 | | 2009 | 2,814.5891031146 | | 2008 | 2,834.9300472809 | | 2007 | 2,545.4252139962 | | 2006 | 2,190.3958895932 | | 2005 | 2,081.0417855363 | | 2004 | 1,788.5824372912 | | 2003 | 1,457.8044303026 | | 2002 | 1,248.9460704365 | | 1991 | 441.72290574328 | | 1990 | 450.64939020927 | | 1989 | 426.5252604248 | | 1988 | 470.17241020234 | | 1987 | 421.51226446094 | | 1986 | 372.90841978457 | | 1985 | 349.660519419 | | 1984 | 409.66344853037 | | 1983 | 457.37061081208 | | 1982 | 492.54698364391 |
|