Year | Value | 2021 | 7.7 | 2020 | 8.88 | 2019 | 9.8 | 2018 | 9.48 | 2017 | 9.42 | 2016 | 10.97 | 2015 | 10.5 | 2014 | 6.95 | 2012 | 7.27 | 2011 | 7.44 | 2010 | 9.15 | 2009 | 7.99 | 2008 | 9.02 | 2007 | 10.03 | 2006 | 9.82 | 2005 | 11.82 | 2004 | 11.6 | 2003 | 11.85 | 2002 | 12.02 | 2001 | 12.03 | 2000 | 11.71 | 1999 | 13.62 | 1998 | 11.89 | 1997 | 11.45 | 1996 | 11.72 | 1995 | 12.48 | 1994 | 11.91 | 1993 | 9.29 |
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