| Year | Value | | 2022 | 151.86630374783 | | 2021 | 133.45546947865 | | 2020 | 127.03713573291 | | 2019 | 123.78038334888 | | 2018 | 119.21693282829 | | 2017 | 113.94636161182 | | 2016 | 112.4407560386 | | 2015 | 114.20499093339 | | 2014 | 114.88760302263 | | 2013 | 113.67322077774 | | 2012 | 109.31724308582 | | 2011 | 105.78925328816 | | 2010 | 100 | | 2009 | 94.258332223005 | | 2008 | 89.27041894284 | | 2007 | 82.772141538344 | | 2006 | 78.952928412357 | | 2005 | 74.093496012334 | | 2004 | 67.966385594914 | | 2003 | 60.752422102518 | | 2002 | 52.70285703409 | | 2001 | 43.00873669985 | | 2000 | 31.982222053029 | | 1999 | 21.955769792602 | | 1998 | 15.058436497356 | | 1997 | 9.4649653918893 | | 1996 | 3.7151970822818 | | 1995 | 2.6760900231205 | | 1994 | 2.0236235190757 | | 1993 | 0.85471731237846 | | 1992 | 0.24065232549638 | | 1991 | 0.077329050337585 | | 1990 | 0.023388925898987 |
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