Year | Value | 2021 | 73.473 | 2020 | 74.403 | 2019 | 75.241 | 2018 | 74.793 | 2017 | 74.833 | 2016 | 74.554 | 2015 | 74.406 | 2014 | 72.622 | 2013 | 74.029 | 2012 | 73.466 | 2011 | 73.243 | 2010 | 73.004 | 2009 | 72.608 | 2008 | 72.413 | 2007 | 72.153 | 2006 | 71.915 | 2005 | 72.067 | 2004 | 71.182 | 2003 | 71.053 | 2002 | 70.969 | 2001 | 69.887 | 2000 | 70.388 | 1999 | 70.855 | 1998 | 70.632 | 1997 | 70.396 | 1996 | 70.055 | 1995 | 69.662 | 1994 | 69.413 | 1993 | 68.853 | 1992 | 68.592 | 1991 | 68.306 | 1990 | 67.934 |
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