Year | Value | 2017 | 64.3774943 | 2016 | 59.6083158 | 2015 | 54.8391373 | 2014 | 50.07 | 2013 | 45.3 | 2012 | 40.5479 | 2011 | 35.6 | 2010 | 31.22 | 2009 | 27.39650968 | 2008 | 27.36177742 | 2007 | 27.33933584 | 2006 | 27.33261054 | 2005 | 27.34431967 | 2004 | 27.37700879 | 2003 | 27.42907299 | 2002 | 27.49443238 | 2001 | 18.37576604 | 2000 | 13.81508054 | 1999 | 11.07460593 | 1998 | 9.245220221 | 1997 | 6.948368986 | 1996 | 4.647185664 | 1995 | 2.801957634 | 1994 | 0.940645283 |
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