Year | Value | 2021 | 45.83807439825 | 2020 | 45.843544857768 | 2019 | 45.849015317287 | 2018 | 45.854485776805 | 2017 | 45.859956236324 | 2016 | 45.865426695843 | 2015 | 45.870897155361 | 2014 | 45.87636761488 | 2013 | 45.881838074398 | 2012 | 45.887308533917 | 2011 | 45.892778993435 | 2010 | 45.898249452954 | 2009 | 45.891849015317 | 2008 | 45.88544857768 | 2007 | 45.879048140044 | 2006 | 45.872647702407 | 2005 | 45.86624726477 | 2004 | 45.859846827134 | 2003 | 45.853446389497 | 2002 | 45.84704595186 | 2001 | 45.840645514223 | 2000 | 45.834245076586 | 1999 | 45.797483588621 | 1998 | 45.760722100657 | 1997 | 45.723960612691 | 1996 | 45.687199124726 | 1995 | 45.650437636762 | 1994 | 45.613676148797 | 1993 | 45.576914660831 | 1992 | 45.540153172867 | 1991 | 45.503391684902 | 1990 | 45.466630196936 |
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