| Year | Value | | 2022 | 86.94113568 | | 2021 | 85.37490906 | | 2020 | 83.18488715 | | 2019 | 80.43590688 | | 2018 | 77.54173454 | | 2017 | 75.98536595 | | 2016 | 73.3007041 | | 2015 | 67.99698716 | | 2014 | 66.6 | | 2013 | 62.8492 | | 2012 | 62.30999727 | | 2011 | 61.94999897 | | 2010 | 62.32 | | 2009 | 58.97 | | 2008 | 53.13 | | 2007 | 48.6 | | 2006 | 44.58 | | 2005 | 38.81 | | 2004 | 32.53 | | 2003 | 24.87 | | 2002 | 21.15 | | 2001 | 9.900669707 | | 2000 | 7.285428708 | | 1999 | 5.45644373 | | 1998 | 4.102272002 | | 1997 | 2.073465474 | | 1996 | 1.295200255 | | 1995 | 0.647752333 | | 1994 | 0.389098144 | | 1993 | 0.129961704 | | 1992 | 0.052127181 | | 1991 | 0.005229468 |
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