| Year | Value | | 2021 | 48.944436095666 | | 2020 | 121.64120551992 | | 2019 | 78.376008798426 | | 2018 | 69.420361713856 | | 2017 | 79.446698587902 | | 2016 | 98.153933500682 | | 2015 | 95.067997640034 | | 2014 | 85.824656475897 | | 2013 | 64.871524074495 | | 2012 | 49.269754152278 | | 2011 | 78.271391383243 | | 2010 | 45.732399499014 | | 2009 | 55.129116727189 | | 2008 | 33.345743477605 | | 2007 | 36.757681763415 | | 2006 | 33.011055497915 | | 2005 | 35.763199638313 | | 2004 | 48.389177175503 | | 2003 | 46.419818262939 | | 2002 | 69.260341380901 | | 2001 | 62.592054263566 | | 2000 | 59.065401489644 | | 1999 | 69.615246314275 | | 1998 | 89.554230105164 | | 1997 | 82.698423916885 | | 1996 | 79.737274220033 | | 1995 | 81.076779026217 | | 1994 | 82.743052071837 | | 1993 | 87.023146163738 | | 1992 | 82.716696363065 | | 1991 | 83.832535352411 | | 1990 | 72.828344532682 |
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