Year | Value | 2022 | 47.672869507732 | 2021 | 47.199260132029 | 2020 | 45.607112186433 | 2019 | 46.888998602103 | 2018 | 47.789960522558 | 2017 | 48.470740267639 | 2016 | 48.931472295488 | 2015 | 47.617811165413 | 2014 | 43.4849578972 | 2013 | 41.447984108019 | 2012 | 36.865788749466 | 2011 | 31.594994972977 | 2010 | 28.95422221568 | 2009 | 26.204456648168 | 2008 | 25.739545651859 | 2007 | 25.018706122653 | 2006 | 23.495349394863 | 2005 | 22.030474093601 | 2004 | 20.722232487184 | 2003 | 19.439095699856 | 2002 | 18.24536309161 | 2001 | 17.073894486734 | 2000 | 15.485481031305 | 1999 | 13.962498335232 | 1998 | 12.571122429695 | 1997 | 11.379312903927 | 1996 | 10.291212199705 | 1995 | 9.9591208953645 | 1994 | 9.8030549750358 | 1993 | 9.7275510187575 | 1992 | 9.6290057642353 | 1991 | 9.5831078792441 |
|