Year | Value | 2021 | 69.00212314225 | 2020 | 68.865061457339 | 2019 | 68.771114672246 | 2018 | 68.635530160893 | 2017 | 70.456065673457 | 2016 | 70.495742092457 | 2015 | 70.498783454988 | 2014 | 70.407542579075 | 2013 | 74.847931873479 | 2012 | 74.863055386488 | 2011 | 74.946727549467 | 2010 | 75.038051750381 | 2009 | 75.15962298571 | 2008 | 75.433262389784 | 2007 | 75.554879902706 | 2006 | 75.494071146245 | 2005 | 75.980541197932 | 2004 | 76.703163017032 | 2003 | 76.909035594767 | 2002 | 77.068126520681 | 2001 | 77.220194647202 | 2000 | 77.372262773723 | 1999 | 77.720364741641 | 1998 | 77.666362807657 | 1997 | 77.642770352369 | 1996 | 77.619192225934 | 1995 | 77.619192225934 | 1994 | 77.62598664238 | 1993 | 77.602427921093 | 1992 | 77.882567690904 |
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