Year | Value | 2023 | 48.840119917338 | 2022 | 48.689310631945 | 2021 | 48.589030206677 | 2020 | 48.370634354954 | 2019 | 48.530196254597 | 2018 | 48.206498804332 | 2017 | 47.932910753352 | 2016 | 47.504806486667 | 2015 | 47.137963423394 | 2014 | 46.830310667909 | 2013 | 46.624484032153 | 2012 | 46.472111338871 | 2011 | 46.169755573462 | 2010 | 45.836684360088 | 2009 | 45.51082761578 | 2008 | 45.273204997587 | 2007 | 45.14984545088 | 2006 | 44.901143241426 | 2005 | 45.166575641726 | 2004 | 45.171840354767 | 2003 | 45.125551837584 | 2002 | 44.988344988345 | 2001 | 44.959281100814 | 2000 | 44.952605968554 | 1999 | 44.940904346845 | 1998 | 44.865033458092 | 1997 | 44.858853721129 | 1996 | 44.976745513168 | 1995 | 45.007806955287 | 1994 | 44.993207290841 | 1993 | 45.240152038701 | 1992 | 45.313696612666 | 1991 | 45.304732925617 |
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