Year | Value | 2021 | 75.939 | 2020 | 76.683 | 2019 | 77.338 | 2018 | 77.137 | 2017 | 76.935 | 2016 | 76.685 | 2015 | 76.443 | 2014 | 75.519 | 2013 | 75.955 | 2012 | 75.664 | 2011 | 75.384 | 2010 | 75.091 | 2009 | 74.735 | 2008 | 74.522 | 2007 | 74.388 | 2006 | 74.143 | 2005 | 73.918 | 2004 | 73.595 | 2003 | 73.331 | 2002 | 72.965 | 2001 | 72.69 | 2000 | 72.449 | 1999 | 72.312 | 1998 | 72.077 | 1997 | 71.838 | 1996 | 71.558 | 1995 | 71.256 | 1994 | 70.951 | 1993 | 70.65 | 1992 | 70.285 | 1991 | 69.915 | 1990 | 69.525 |
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