Year | Value | 2022 | 4.86 | 2020 | 4.89 | 2019 | 4.8 | 2018 | 4.85 | 2017 | 4.9 | 2016 | 4.96 | 2015 | 4.93 | 2014 | 5.06 | 2013 | 5.2 | 2012 | 5.29 | 2011 | 5.39 | 2010 | 5.77 | 2009 | 6.55 | 2008 | 6.63 | 2007 | 7.26 | 2006 | 7.79 | 2005 | 8.13 | 2004 | 8.4 | 2003 | 8.78 | 2002 | 9.33 | 2001 | 10.43 | 2000 | 12.75 | 1999 | 13.46 | 1998 | 13.13 | 1997 | 13.01 | 1996 | 12.96 | 1995 | 10.98 | 1994 | 7.54 | 1993 | 1.11 | 1992 | 0.4 | 1991 | 0.05 |
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