Year | Value | 2021 | 5.73 | 2020 | 8.84 | 2019 | 16.38 | 2018 | 12.06 | 2017 | 10.35 | 2015 | 7.87 | 2014 | 9.33 | 2012 | 9.94 | 2011 | 9.97 | 2010 | 9.79 | 2009 | 10.77 | 2008 | 10.95 | 2007 | 11.08 | 2006 | 11.4 | 2005 | 11.73 | 2004 | 10.57 | 2003 | 9.62 | 2001 | 9.61 | 2000 | 9.72 | 1998 | 11.16 | 1997 | 20.19 | 1994 | 24.51 | 1993 | 23.9 | 1990 | 26.38 |
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