Year | Value | 2022 | 0.69393999875333 | 2021 | 0.76855558144666 | 2020 | 0.80932491034359 | 2019 | 0.76934097939903 | 2018 | 0.71587628355749 | 2015 | 1.0405221232392 | 2014 | 1.2076885362678 | 2013 | 0.73951115251975 | 2012 | 0.7923253018573 | 2009 | 0.48220542789201 | 2008 | 1.0949176575186 | 2007 | 0.35531837743594 | 2006 | 0.26024237839184 | 2005 | 0.2770274289098 | 2004 | 0.19262140178727 | 2003 | 0.22738863621398 | 2002 | 0.24438080993324 | 2001 | 0.23486205892938 | 2000 | 0.31579359886356 | 1999 | 0.32583306138246 | 1998 | 0.38483381490596 | 1997 | 0.40757594550219 | 1996 | 0.39730746940373 | 1995 | 0.3046156701716 | 1994 | 0.25555749176349 | 1993 | 0.27921975389438 | 1992 | 0.40965049890424 | 1991 | 0.50424326671404 | 1990 | 0.46126597245397 | 1989 | 0.9583922698168 | 1988 | 0.81053131725314 | 1987 | 0.631086622245 | 1986 | 0.56393901680149 | 1985 | 0.55122589453325 | 1984 | 0.47750157331655 | 1983 | 0.34090903037837 |
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