Year | Value | 2022 | 69.059536113118 | 2021 | 68.877143764062 | 2020 | 68.742491491852 | 2019 | 69.005223898157 | 2018 | 69.161664007025 | 2017 | 69.1942738043 | 2016 | 69.341104598027 | 2015 | 69.002418109244 | 2014 | 69.538321313049 | 2013 | 69.173464786706 | 2012 | 69.191314050784 | 2011 | 69.819395678051 | 2010 | 69.684073446276 | 2009 | 69.640407723496 | 2008 | 71.176730168819 | 2007 | 72.225325825435 | 2006 | 72.866816701829 | 2005 | 73.571194820587 | 2004 | 74.32724873297 | 2003 | 75.23366420566 | 2002 | 76.189042389893 | 2001 | 77.01242842027 | 2000 | 77.896123817578 | 1999 | 78.493624522411 | 1998 | 78.932193300982 | 1997 | 79.72981613248 | 1996 | 80.293507524219 | 1995 | 74.245592702186 | 1994 | 66.169575921039 | 1993 | 65.368113995936 | 1992 | 64.500783867695 | 1991 | 63.352484992142 |
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