Year | Value | 2022 | 28.160012271809 | 2021 | 27.664265680134 | 2020 | 24.68134854049 | 2019 | 24.968015705563 | 2018 | 26.399024364929 | 2017 | 24.444515496247 | 2016 | 23.674867278045 | 2015 | 24.806521727992 | 2014 | 23.658716114231 | 2013 | 23.159349784194 | 2012 | 24.296144136607 | 2011 | 25.17799714401 | 2010 | 23.436269060134 | 2009 | 21.193326945351 | 2008 | 26.321312679398 | 2007 | 26.401447091433 | 2006 | 26.428695085438 | 2005 | 25.705172325654 | 2004 | 24.764982881534 | 2003 | 23.548222285988 | 2002 | 24.243859060529 | 2001 | 25.486839011197 | 2000 | 26.825843809506 | 1999 | 23.086593490198 | 1998 | 20.173828839358 | 1997 | 20.190138765988 | 1996 | 22.770612933957 | 1995 | 22.997080234476 | 1994 | 25.025923271465 |
|