Year | Value | 2022 | 2.886 | 2021 | 3.363 | 2020 | 3.162 | 2019 | 3.277 | 2018 | 3.846 | 2017 | 4.888 | 2016 | 6.161 | 2015 | 7.501 | 2014 | 8.99 | 2013 | 10.326 | 2012 | 10.088 | 2011 | 9.632 | 2010 | 9.637 | 2009 | 8.167 | 2008 | 7.118 | 2007 | 9.602 | 2006 | 13.841 | 2005 | 17.746 | 2004 | 19.074 | 2003 | 19.37 | 2002 | 21.21 | 2001 | 18.373 | 2000 | 16.314 | 1999 | 12.29 | 1998 | 9.935 | 1997 | 10.964 | 1996 | 12.684 | 1995 | 13.695 | 1994 | 14.825 | 1993 | 14.393 | 1992 | 13.645 |
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