Year | Value | 2021 | 33.866926412038 | 2020 | 33.866926412038 | 2019 | 33.866926412038 | 2018 | 33.866926412038 | 2017 | 33.866926412038 | 2016 | 33.899722544717 | 2015 | 33.899722544717 | 2014 | 33.869659423094 | 2013 | 33.839596301471 | 2012 | 33.809533179847 | 2011 | 33.779470058224 | 2010 | 33.749406936601 | 2009 | 33.69273521933 | 2008 | 33.636063502058 | 2007 | 33.526247773392 | 2006 | 33.469665746918 | 2005 | 33.413083720443 | 2004 | 33.356501693968 | 2003 | 33.299919667493 | 2002 | 33.243337641018 | 2001 | 33.186755614544 | 2000 | 33.130173588069 | 1999 | 33.129023382568 | 1998 | 33.117166141134 | 1997 | 33.1053088997 | 1996 | 33.093451658267 | 1995 | 33.081594416833 | 1994 | 33.0697371754 | 1993 | 33.057879933966 | 1992 | 33.046022692533 | 1991 | 33.034165451099 | 1990 | 33.022308209666 |
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