Year | Value | 2022 | 73.37491174394 | 2021 | 73.24128542953 | 2020 | 73.079485724157 | 2019 | 73.567333567334 | 2018 | 73.748163350981 | 2017 | 73.689009421831 | 2016 | 73.617708308959 | 2015 | 73.709866416686 | 2014 | 73.665296535525 | 2013 | 73.827114018164 | 2012 | 73.873297809355 | 2011 | 74.007700717783 | 2010 | 74.233128834356 | 2009 | 74.430918331166 | 2008 | 74.570924072984 | 2007 | 74.78355748476 | 2006 | 74.351426383305 | 2005 | 74.22400852259 | 2004 | 74.245854941202 | 2003 | 73.997734436564 | 2002 | 73.85760096202 | 2001 | 73.872338260361 | 2000 | 73.981935088794 | 1999 | 74.117255163224 | 1998 | 74.35877546799 | 1997 | 74.301545184954 | 1996 | 74.165545265047 | 1995 | 74.208457288568 | 1994 | 74.269920453013 | 1993 | 74.263528006299 | 1992 | 74.211339069049 | 1991 | 74.156545209177 |
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