| Year | Value | | 2020 | -2.0893366652767 | | 2019 | 4.6152216053584 | | 2018 | -5.5882417859403 | | 2017 | 14.292592121757 | | 2016 | 10.871063864828 | | 2015 | 12.14783790932 | | 2014 | 9.9882238355481 | | 2013 | 0.67170355540321 | | 2012 | -12.820411702572 | | 2011 | 18.441729102715 | | 2010 | 12.757682430287 | | 2009 | -3.5585982146502 | | 2008 | 4.8998996273883 | | 2007 | 1.1376302707355 | | 2006 | 2.009062604598 | | 2005 | 1.9105256605762 | | 2004 | 10.012539482535 | | 2003 | -9.5052574718237 | | 2002 | 3.1327741063717 | | 2001 | 10.200953701221 |
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