Year | Value | 2021 | 39.470127925632 | 2020 | 38.695512509495 | 2019 | 38.699637168329 | 2018 | 38.703762942539 | 2017 | 38.707887601374 | 2016 | 38.712013375584 | 2015 | 38.716438070445 | 2014 | 38.721044571523 | 2013 | 38.725651072601 | 2012 | 38.730257573679 | 2011 | 38.734864074757 | 2010 | 38.739470575835 | 2009 | 38.744821701639 | 2008 | 38.750172827444 | 2007 | 38.755523953248 | 2006 | 38.760875079052 | 2005 | 38.766226204857 | 2004 | 38.771577330661 | 2003 | 38.776928456465 | 2002 | 38.78227958227 | 2001 | 38.787630708074 | 2000 | 38.792981833878 | 1999 | 38.798234806633 | 1998 | 38.803487779388 | 1997 | 38.808740752142 | 1996 | 38.813993724897 | 1995 | 38.819246697652 | 1994 | 38.824499670407 | 1993 | 38.829752643161 | 1992 | 38.835005615916 | 1991 | 38.840258588671 | 1990 | 38.845511561425 |
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