Year | Value | 2022 | 64.19012145749 | 2021 | 64.034085531564 | 2020 | 63.953713901762 | 2019 | 64.28617388389 | 2018 | 64.067710461878 | 2017 | 64.059679691168 | 2016 | 64.184685588736 | 2015 | 64.889913907949 | 2014 | 65.58886907822 | 2013 | 66.29307721426 | 2012 | 67.082928966041 | 2011 | 67.737310119142 | 2010 | 68.488829350503 | 2009 | 69.348706537747 | 2008 | 70.002767422553 | 2007 | 70.74807972454 | 2006 | 71.38853662086 | 2005 | 72.083213137508 | 2004 | 72.772733199029 | 2003 | 73.355674804335 | 2002 | 74.129498128367 | 2001 | 74.810620817426 | 2000 | 75.473989550387 | 1999 | 76.150452239135 | 1998 | 76.876171770378 | 1997 | 77.528419607949 | 1996 | 77.617776959882 | 1995 | 77.799134125717 | 1994 | 77.797918045162 | 1993 | 77.916100106575 | 1992 | 77.866656658019 | 1991 | 77.863591703857 |
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