Year | Value | 2021 | 47.294474066893 | 2020 | 47.250969461949 | 2019 | 47.207464857004 | 2018 | 47.16396025206 | 2017 | 47.120455647116 | 2016 | 47.076951042172 | 2015 | 47.033325254484 | 2014 | 46.989723703345 | 2013 | 46.946122152205 | 2012 | 46.902520601066 | 2011 | 46.858919049927 | 2010 | 46.815317498788 | 2009 | 46.784949103248 | 2008 | 46.754580707707 | 2007 | 46.724212312167 | 2006 | 46.693843916626 | 2005 | 46.663475521086 | 2004 | 46.633107125545 | 2003 | 46.602738730005 | 2002 | 46.572370334464 | 2001 | 46.542001938924 | 2000 | 46.511633543383 | 1999 | 46.435930683471 | 1998 | 46.360227823558 | 1997 | 46.284524963645 | 1996 | 46.208822103732 | 1995 | 46.13311924382 | 1994 | 46.057416383907 | 1993 | 45.981713523994 | 1992 | 45.906010664081 | 1991 | 45.830307804169 | 1990 | 45.754604944256 |
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