| Year | Value | | 2021 | 12.071018029037 | | 2020 | -1.4327501550557 | | 2019 | 3.1975794036589 | | 2018 | 16.1707253381 | | 2017 | 2.957199680474 | | 2016 | 3.2785704983776 | | 2015 | 7.0536462967806 | | 2014 | -1.8359249713022 | | 2013 | 2.8866926015969 | | 2012 | 2.688640480063 | | 2011 | -9.5330919512334 | | 2010 | 3.0298719053817 | | 2009 | 5.9323663154639 | | 2008 | 0.77625937334267 | | 2007 | 5.3110905583969 | | 2006 | 3.0672675952228 | | 2005 | -1.5728792889827 |
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