Year | Value | 2022 | 67.267355747411 | 2021 | 67.261134848369 | 2020 | 67.548801837503 | 2019 | 68.040584748054 | 2018 | 68.219019646351 | 2017 | 68.436861763328 | 2016 | 68.522234291745 | 2015 | 68.194963253388 | 2014 | 67.771710675821 | 2013 | 67.350280366125 | 2012 | 67.299334443571 | 2011 | 67.356253394807 | 2010 | 67.322570738944 | 2009 | 67.090031543704 | 2008 | 67.070266172171 | 2007 | 66.310381979004 | 2006 | 65.420856639624 | 2005 | 64.496645703757 | 2004 | 64.072381706031 | 2003 | 63.810807518053 | 2002 | 63.897237741411 | 2001 | 63.870352407121 | 2000 | 63.811644025025 | 1999 | 63.645128975995 | 1998 | 63.690691092649 | 1997 | 63.683767713518 | 1996 | 63.70746216667 | 1995 | 63.345002251612 | 1994 | 62.960716016885 | 1993 | 62.929319059925 | 1992 | 63.304639748278 | 1991 | 63.682433454844 |
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