Year | Value | 2022 | 79.2 | 2021 | 81.2 | 2020 | 82.1 | 2019 | 80.6 | 2018 | 82.6 | 2017 | 85.1 | 2016 | 87.3 | 2015 | 87.6 | 2014 | 88.1 | 2013 | 88.6 | 2012 | 89.2 | 2011 | 90.1 | 2010 | 91.5 | 2009 | 92.3 | 2008 | 92.6 | 2007 | 92.9 | 2006 | 93.2 | 2005 | 93.6 | 2004 | 94 | 2003 | 94.5 | 2002 | 94.8 | 1996 | 95.6 | 1995 | 95.9 | 1994 | 96.1 | 1993 | 96.4 | 1992 | 96.4 | 1991 | 96.6 | 1990 | 96.7 | 1989 | 96.7 | 1988 | 96.7 | 1987 | 96.8 | 1986 | 96.9 | 1985 | 97 | 1984 | 97.2 | 1983 | 97.4 | 1982 | 97.5 | 1981 | 97.6 |
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