Year | Value | 2021 | 27.19473678861 | 2020 | 27.17984737948 | 2019 | 27.148011008033 | 2018 | 27.116707264035 | 2017 | 27.086059059773 | 2016 | 27.086679501885 | 2015 | 26.976046160267 | 2014 | 26.924736282313 | 2013 | 26.873800457447 | 2012 | 26.822016231136 | 2011 | 26.770843758172 | 2010 | 26.719469913325 | 2009 | 26.651528125637 | 2008 | 26.583114594731 | 2007 | 26.514782044769 | 2006 | 26.446176464542 | 2005 | 26.381097647469 | 2004 | 26.315591327774 | 2003 | 26.246762756573 | 2002 | 26.185581147718 | 2001 | 26.116580501221 | 2000 | 26.048425558045 | 1999 | 26.120207497015 | 1998 | 26.137110555831 | 1997 | 26.154013610541 | 1996 | 26.170916669356 | 1995 | 26.187701462855 | 1994 | 26.204593683704 | 1993 | 26.22149665925 | 1992 | 26.238399630692 | 1991 | 26.255302602133 | 1990 | 26.268204752678 |
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