Year | Value | 2022 | 78.475 | 2021 | 76.032 | 2020 | 75.85 | 2019 | 77.832 | 2018 | 77.563 | 2017 | 77.141 | 2016 | 76.66 | 2015 | 76.646 | 2014 | 76.565 | 2013 | 76.297 | 2012 | 75.678 | 2011 | 74.941 | 2010 | 75.069 | 2009 | 74.765 | 2008 | 74.45 | 2007 | 74.193 | 2006 | 73.845 | 2005 | 73.534 | 2004 | 73.24 | 2003 | 72.89 | 2002 | 72.579 | 2001 | 72.231 | 2000 | 71.861 | 1999 | 70.695 | 1998 | 71.039 | 1997 | 70.57 | 1996 | 70.141 | 1995 | 69.609 | 1994 | 69.295 | 1993 | 68.911 | 1992 | 68.486 | 1991 | 68.169 | 1990 | 67.709 | 1989 | 67.245 | 1988 | 66.794 | 1987 | 66.278 | 1986 | 65.772 | 1985 | 65.24 | 1984 | 64.706 | 1983 | 64.146 | 1982 | 63.604 | 1981 | 63.01 | 1980 | 62.504 | 1979 | 61.912 | 1978 | 61.37 | 1977 | 60.743 | 1976 | 59.965 | 1975 | 59.497 | 1974 | 59.051 |
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