Year | Value | 2017 | 9.62 | 2016 | 11.16 | 2015 | 10.73 | 2014 | 11.48 | 2013 | 11.64 | 2012 | 11.4 | 2011 | 12.93 | 2010 | 12.34 | 2009 | 13 | 2008 | 12.6 | 2007 | 13.8 | 2006 | 14.44 | 2005 | 15.62 | 2004 | 19.82 | 2003 | 18.98 | 2002 | 22.85 | 2001 | 21.94 | 2000 | 22.94 | 1999 | 26.33 | 1998 | 27.56 | 1997 | 25.24 | 1996 | 36.32 | 1995 | 50.26 | 1994 | 46.9 | 1993 | 23.09 | 1992 | 56.02 | 1990 | 55.04 | 1989 | 105.36 |
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