Year | Value | 2022 | 64.825452938577 | 2021 | 64.681888580498 | 2020 | 64.608648056924 | 2019 | 64.7531770069 | 2018 | 64.554648854721 | 2017 | 64.531964743947 | 2016 | 64.482681133832 | 2015 | 64.446377932457 | 2014 | 64.330508337249 | 2013 | 64.203846721432 | 2012 | 64.167537876902 | 2011 | 64.103065564954 | 2010 | 63.937605812061 | 2009 | 63.774432338019 | 2008 | 63.963538149899 | 2007 | 64.013303769401 | 2006 | 63.829714128642 | 2005 | 63.822194505076 | 2004 | 63.685391694647 | 2003 | 63.577695219158 | 2002 | 63.330007177494 | 2001 | 63.218976051689 | 2000 | 63.020303678508 | 1999 | 62.860098539442 | 1998 | 62.819926873857 | 1997 | 62.737146484237 | 1996 | 62.819558203028 | 1995 | 62.883762200532 | 1994 | 62.950837173716 | 1993 | 62.957034692373 | 1992 | 63.0168467148 | 1991 | 63.073615943745 |
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