Year | Value | 2020 | 0.43972426913627 | 2019 | 0.51113222580821 | 2018 | 0.48895695037376 | 2017 | 0.50940765499466 | 2016 | 0.53203150199626 | 2015 | 0.58946335414842 | 2014 | 0.60518987801882 | 2013 | 0.64151149665607 | 2012 | 0.66504716695489 | 2011 | 0.67541461603947 | 2010 | 0.63267078815823 | 2009 | 0.62577455427726 | 2008 | 0.57240201048644 | 2007 | 0.56643242419281 | 2005 | 0.58673767794199 | 2004 | 0.59392559810046 | 2003 | 0.68739028900874 | 2002 | 0.74103998516747 | 2001 | 0.71300860551581 | 2000 | 1.0284128322975 | 1999 | 0.98724715227652 | 1998 | 0.91231987977929 | 1997 | 0.95178455139945 | 1996 | 0.97760101057171 | 1995 | 0.98676787556234 | 1994 | 0.53527245505297 | 1993 | 0.5817195215963 | 1992 | 0.57225015018256 | 1991 | 0.61283485542568 |
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