Year | Value | 2021 | 24.61542010867 | 2020 | 21.905986660901 | 2019 | 22.115000518815 | 2018 | 22.695604921446 | 2017 | 24.241723335638 | 2016 | 23.042258592394 | 2015 | 23.06710090437 | 2014 | 22.854807724374 | 2013 | 22.558253926938 | 2012 | 21.712248510291 | 2011 | 22.302987874282 | 2010 | 22.084822829708 | 2009 | 21.390010727571 | 2008 | 23.282033054786 | 2007 | 25.300632769304 | 2006 | 25.314346886232 | 2005 | 24.565619514979 | 2004 | 24.042567244474 | 2003 | 24.138602349421 | 2002 | 24.904034932653 | 2001 | 25.903546187533 | 2000 | 26.385832164032 | 1999 | 24.762243824463 | 1998 | 24.813281943877 | 1997 | 25.694063500093 | 1996 | 25.299043947871 | 1995 | 25.874730781419 |
|