Year | Value | 2021 | 40.615915959131 | 2020 | 40.615915959131 | 2019 | 40.615915959131 | 2018 | 40.615915959131 | 2017 | 40.615915959131 | 2016 | 40.615915959131 | 2015 | 40.615915959131 | 2014 | 40.615915959131 | 2013 | 40.615915959131 | 2012 | 40.615915959131 | 2011 | 40.615915959131 | 2010 | 40.615915959131 | 2009 | 40.526982299611 | 2008 | 40.438048640092 | 2007 | 40.349114980573 | 2006 | 40.260181321053 | 2005 | 40.171247661534 | 2004 | 40.082314002015 | 2003 | 39.993380342495 | 2002 | 39.904446682976 | 2001 | 39.815513023457 | 2000 | 39.726579363937 | 1999 | 39.714635199309 | 1998 | 39.702691034681 | 1997 | 39.690746870053 | 1996 | 39.678802705425 | 1995 | 39.666858540797 | 1994 | 39.654914376169 | 1993 | 39.642970211541 | 1992 | 39.631026046913 |
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