Year | Value | 2021 | 11.43 | 2020 | 12.27 | 2019 | 11.77 | 2018 | 12.83 | 2017 | 12.82 | 2016 | 11.7 | 2015 | 11.7 | 2014 | 12.29 | 2013 | 12.3 | 2012 | 12.29 | 2011 | 12.68 | 2010 | 12.67 | 2009 | 12.67 | 2008 | 12.88 | 2007 | 12.88 | 2006 | 12.18 | 2005 | 13.45 | 2004 | 13.64 | 2003 | 13.64 | 2002 | 13.63 | 2001 | 13.46 | 1999 | 11.17 | 1998 | 15.14 | 1997 | 15.14 | 1996 | 15.14 | 1995 | 3.46 |
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