Year | Value | 2021 | 38.439999819773 | 2020 | 34.425633173069 | 2019 | 30.050764288286 | 2018 | 26.977403804546 | 2017 | 23.941494744792 | 2016 | 20.727831073084 | 2015 | 18.392262720133 | 2014 | 15.82787521226 | 2013 | 13.630740903445 | 2012 | 11.788677059584 | 2011 | 9.7822723916954 | 2010 | 8.3977907028188 | 2009 | 6.7139970981697 | 2008 | 5.2459301864722 | 2007 | 4.3588535004392 | 2006 | 3.19367844887 | 2005 | 2.3323716974782 | 2004 | 1.4550885404986 | 2003 | 1.0725586013611 | 2002 | 0.70417880166881 | 2001 | 0.4486203475446 | 2000 | 0.37703996057356 | 1999 | 0.24403269360199 | 1998 | 0.14176095366599 | 1997 | 0.062514492723742 | 1996 | 0.02905203371467 | 1995 | 0.0097520760684996 | 1994 | 0.0036408614670173 | 1993 | 0.0017970039655461 | 1992 | 0.00050142046220397 |
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