Year | Value | 2021 | 68.40877914952 | 2020 | 68.40877914952 | 2019 | 68.40877914952 | 2018 | 68.40877914952 | 2017 | 68.40877914952 | 2016 | 68.422496570645 | 2015 | 68.433470507545 | 2014 | 68.445541838134 | 2013 | 68.457613168724 | 2012 | 68.469684499314 | 2011 | 68.481755829904 | 2010 | 68.493827160494 | 2009 | 68.469135802469 | 2008 | 68.444444444444 | 2007 | 68.41975308642 | 2006 | 68.395061728395 | 2005 | 68.37037037037 | 2004 | 68.345679012346 | 2003 | 68.320987654321 | 2002 | 68.296296296296 | 2001 | 68.271604938272 | 2000 | 68.246913580247 | 1999 | 68.267215363512 | 1998 | 68.287517146776 | 1997 | 68.307818930041 | 1996 | 68.328120713306 | 1995 | 68.329676357652 | 1994 | 68.349972572682 | 1993 | 68.370268787713 | 1992 | 68.390565002743 | 1991 | 68.410861217773 | 1990 | 68.431157432803 |
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