Year | Value | 2022 | 27.89234380386 | 2021 | 27.502570639392 | 2020 | 27.211885451054 | 2019 | 27.178388725701 | 2018 | 26.987610480916 | 2017 | 26.905836395665 | 2016 | 27.286915184297 | 2015 | 27.219125236946 | 2014 | 27.428609244295 | 2013 | 26.691587086717 | 2012 | 26.964267877281 | 2011 | 26.813551676582 | 2010 | 26.714800895412 | 2009 | 26.748831623033 | 2008 | 27.224377851239 | 2007 | 27.675013190073 | 2006 | 27.63323993189 | 2005 | 27.711923328607 | 2004 | 27.325429131885 | 2003 | 27.486653815625 | 2002 | 27.676043903467 | 2001 | 27.608757379939 | 2000 | 27.335692420199 | 1999 | 27.669433802914 | 1998 | 27.536565374767 | 1997 | 27.25075614819 | 1996 | 26.675648093104 | 1995 | 26.289935277309 | 1994 | 25.892522175853 | 1993 | 25.273382143123 | 1992 | 24.937749237077 | 1991 | 24.594383152276 |
|