Year | Value | 2021 | 1.08 | 2020 | 1.14 | 2019 | 1.27 | 2018 | 1.25 | 2017 | 1.38 | 2015 | 2.81 | 2014 | 2.8 | 2013 | 2.88 | 2011 | 3.12 | 2010 | 4.74 | 2009 | 4.54 | 2008 | 4.69 | 2007 | 8.48 | 2006 | 8.56 | 2005 | 9.19 | 2004 | 9.76 | 2003 | 9.68 | 2002 | 10.31 | 2001 | 11.86 | 2000 | 13.2 | 1999 | 13.08 | 1998 | 13.14 | 1997 | 13.2 | 1995 | 16.24 | 1993 | 17.92 |
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