Year | Value | 2022 | 0.3329049195008 | 2021 | 0.33912149849894 | 2020 | 0.39945482110579 | 2019 | 0.36288782816229 | 2018 | 0.33022670025189 | 2017 | 0.35503448275862 | 2016 | 0.38107692307692 | 2015 | 0.45990016638935 | 2014 | 0.48441330998249 | 2013 | 0.49454926624738 | 2012 | 0.51947173893446 | 2011 | 0.35692509732189 | 2010 | 0.32514450867052 | 2009 | 0.44794302314685 | 2008 | 0.33701447067784 | 2007 | 0.41160260033918 | 2006 | 0.3769200472627 | 2005 | 0.41663776935302 | 2004 | 0.38912247065736 | 2003 | 0.34576318145034 | 2002 | 0.37163793146089 | 2001 | 0.54729485230523 | 2000 | 0.63910765431766 | 1999 | 0.69139452229237 | 1998 | 0.87922032066839 | 1997 | 1.0753537542736 | 1996 | 1.0173113664403 | 1995 | 0.77551609329382 | 1994 | 1.0132052987161 | 1993 | 0.91745823362688 | 1992 | 0.89035134310627 | 1991 | 0.92468589406195 | 1990 | 1.4191337327407 | 1989 | 1.4965361000755 | 1988 | 1.266286002713 | 1987 | 1.6107832056595 | 1986 | 1.5649331096486 | 1985 | 1.5588783347725 | 1981 | 1.4096385542169 | 1980 | 1.4030832255282 | 1979 | 1.2103096272066 | 1978 | 1.2664495114006 | 1977 | 1.250088633624 | 1976 | 1.6312587739822 | 1975 | 0.60358565737052 |
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