| Year | Value | | 2022 | 84.49690644 | | 2021 | 82.30902804 | | 2020 | 78.26166044 | | 2019 | 75.34637794 | | 2018 | 74.66096815 | | 2017 | 73.79121395 | | 2016 | 70.42356709 | | 2015 | 68.63286148 | | 2014 | 64.59 | | 2013 | 62.0956 | | 2012 | 60.33999749 | | 2011 | 55.24999688 | | 2010 | 53.3 | | 2009 | 48.27 | | 2008 | 44.13 | | 2007 | 42.09 | | 2006 | 38.01 | | 2005 | 34.99 | | 2004 | 31.78 | | 2003 | 29.67 | | 2002 | 19.37 | | 2001 | 18.08713656 | | 2000 | 16.43046769 | | 1999 | 14.74233784 | | 1998 | 9.870446442 | | 1997 | 4.953001955 | | 1996 | 2.98087767 | | 1995 | 1.494334529 | | 1994 | 0.718905754 | | 1993 | 0.450161608 | | 1992 | 0.250426501 | | 1991 | 0.10023057 |
|