Year | Value | 2022 | 70.536681014463 | 2021 | 69.137222540576 | 2020 | 70.821354346099 | 2019 | 69.298924803899 | 2018 | 68.94068483183 | 2017 | 70.286138243962 | 2016 | 70.04588878744 | 2015 | 68.7552339521 | 2014 | 70.092154763035 | 2013 | 71.904615008818 | 2012 | 73.729123910981 | 2011 | 73.483837559213 | 2010 | 74.065985514402 | 2009 | 75.492741992165 | 2008 | 74.898634654075 | 2007 | 75.036918412154 | 2006 | 75.219171713238 | 2005 | 76.811064907112 | 2004 | 76.936824288364 | 2003 | 79.328009795708 | 2002 | 76.4427428259 | 2001 | 75.055212452999 | 2000 | 75.625920703402 | 1999 | 75.574326408678 | 1998 | 72.854166375398 | 1997 | 72.756164426978 | 1996 | 74.717594935909 | 1995 | 76.861613406567 | 1994 | 83.645790508464 | 1993 | 87.580724606539 | 1992 | 83.55549470648 | 1991 | 79.906420310145 |
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