Year | Value | 2021 | 33.598186427116 | 2020 | 33.645005412674 | 2019 | 33.683334043394 | 2018 | 33.723745795855 | 2017 | 33.761775791416 | 2016 | 33.81807002963 | 2015 | 33.845913533009 | 2014 | 33.895428969742 | 2013 | 33.942767669041 | 2012 | 33.989179132013 | 2011 | 34.036850992931 | 2010 | 34.084733286684 | 2009 | 34.138251496219 | 2008 | 34.190510862876 | 2007 | 34.243536272014 | 2006 | 34.296805471921 | 2005 | 34.351909031189 | 2004 | 34.407190000949 | 2003 | 34.460450186479 | 2002 | 34.517464399796 | 2001 | 34.57024642084 | 2000 | 34.623884649995 | 1999 | 34.731534747457 | 1998 | 34.817946203067 | 1997 | 34.889828894785 | 1996 | 34.973506594382 | 1995 | 35.056684873643 | 1994 | 35.138730533586 | 1993 | 35.216826962113 | 1992 | 35.298516831749 |
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