| Year | Value | | 2020 | -11.982411631599 | | 2019 | 2.103146636649 | | 2018 | 8.1063840118748 | | 2017 | 5.7578249048629 | | 2016 | -1.4808688875802 | | 2015 | -11.729645217109 | | 2014 | 0.63918488261234 | | 2013 | 0.39069743171817 | | 2012 | 5.0860325147389 | | 2011 | 17.574599327448 | | 2010 | 14.141215441638 | | 2009 | -12.345967263373 | | 2008 | 15.839703896803 | | 2007 | 6.8067344669602 | | 2006 | 11.023644940926 | | 2005 | 19.565212297457 | | 2004 | 13.734553101831 | | 2003 | 4.6103489007285 | | 2002 | 10.17671946227 | | 2001 | -1.2784738327349 |
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