Year | Value | 2021 | 33.920545748336 | 2020 | 33.9458674933 | 2019 | 33.961440847192 | 2018 | 33.97969174339 | 2017 | 33.996115714965 | 2016 | 34.033874692271 | 2015 | 34.040222103453 | 2014 | 34.065754198197 | 2013 | 34.091378557601 | 2012 | 34.116607418505 | 2011 | 34.142135321659 | 2010 | 34.167655783367 | 2009 | 34.205330356716 | 2008 | 34.241646712321 | 2007 | 34.278838393039 | 2006 | 34.316059564216 | 2005 | 34.355407890963 | 2004 | 34.394986198958 | 2003 | 34.433262894068 | 2002 | 34.474809829801 | 2001 | 34.512175679902 | 2000 | 34.549949683034 | 1999 | 34.64075163739 | 1998 | 34.713269262169 | 1997 | 34.769681213443 | 1996 | 34.839172943607 | 1995 | 34.908156042823 | 1994 | 34.975827240116 | 1993 | 35.042590577647 | 1992 | 35.109888875499 |
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