| Year | Value | | 2022 | 11.580510454201 | | 2021 | 3.3536913920796 | | 2020 | 0.19822792299485 | | 2019 | 2.6759920263991 | | 2018 | 1.0537977365496 | | 2017 | 1.4882343059239 | | 2016 | 0.27316943104511 | | 2015 | 0.53692939274075 | | 2014 | 0.428957808324 | | 2013 | 1.7673242835491 | | 2012 | 2.4767378215653 | | 2011 | 7.3364177131527 | | 2010 | 3.4805076373585 | | 2009 | -2.4102640166124 | | 2008 | 9.3504176465819 | | 2007 | 4.3584969532836 | | 2006 | 0.62164693860173 | | 2005 | -1.385189131593 | | 2004 | -1.0647269660553 | | 2003 | -1.0848126232741 |
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