Year | Value | 2020 | 5.293 | 2019 | 8.98 | 2018 | 9.35 | 2017 | 5.83 | 2016 | 5.16 | 2015 | 5.15 | 2014 | 5.09 | 2013 | 4.86 | 2012 | 4.87 | 2011 | 4.96 | 2010 | 5.36 | 2009 | 5.04 | 2008 | 4.89 | 2007 | 4.99 | 2006 | 0.2 | 2005 | 0.3 | 2004 | 0.4 | 2003 | 0.3 | 2002 | 0.4 | 2001 | 0.4 | 2000 | 0.4 | 1995 | 0.4 | 1994 | 0.4 | 1993 | 0.4 | 1992 | 0.2 |
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