| Year | Value | | 2019 | -15.854659619028 | | 2018 | 2.1055946316977 | | 2017 | -10.012293280384 | | 2016 | -15.556439441989 | | 2015 | -2.924763104157 | | 2014 | 2.6166441190781 | | 2013 | 19.354823285145 | | 2012 | 6.9355462421535 | | 2011 | 80.58689282034 | | 2010 | -49.131762298988 | | 2009 | -26.821468506405 | | 2008 | 27.598475557213 | | 2007 | 24.80748493267 | | 2006 | 3,582.5953242955 |
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