Year | Value | 2020 | 0.48339201680751 | 2019 | 0.481243497293 | 2018 | 0.49722596670494 | 2017 | 0.4990113598375 | 2016 | 0.49993763185582 | 2015 | 0.51439346877024 | 2014 | 0.53018757389268 | 2013 | 0.53295334684911 | 2012 | 0.53429483177367 | 2011 | 0.5348054265668 | 2010 | 0.52650556954216 | 2009 | 0.52573288138734 | 2008 | 0.5202587876877 | 2007 | 0.52271117757893 | 2006 | 0.5968840820092 | 2005 | 0.61414374631147 | 2004 | 0.59555496947304 | 2003 | 0.63238209025422 | 2002 | 0.63490585497271 | 2001 | 0.63671251904635 | 2000 | 0.66873928059055 | 1999 | 0.6676389613221 | 1998 | 0.68012947658383 | 1997 | 0.66907336698532 | 1996 | 0.74263930435979 | 1995 | 0.75079222819639 | 1994 | 0.54962831677793 | 1993 | 0.5921651110506 | 1992 | 0.61632186851804 | 1991 | 0.65228927938812 |
|