Year | Value | 2022 | 76.418352019501 | 2021 | 77.093256910122 | 2020 | 77.721041799931 | 2019 | 75.790568668649 | 2018 | 76.258887093491 | 2017 | 75.896144489086 | 2016 | 76.127446329286 | 2015 | 78.121280829572 | 2014 | 79.571312761439 | 2013 | 79.552714784891 | 2012 | 81.391688338642 | 2011 | 78.483505894684 | 2010 | 80.666463882759 | 2009 | 79.716724719845 | 2008 | 82.808890446612 | 2007 | 85.216255307075 | 2006 | 85.035370179425 | 2005 | 86.915408050324 | 2004 | 87.71726530842 | 2003 | 88.105820225394 | 2002 | 87.445982695207 | 2001 | 87.967662113486 | 2000 | 86.261847161659 | 1999 | 84.731686412488 | 1998 | 74.453906679953 | 1997 | 77.583979745651 | 1996 | 87.669370808165 | 1995 | 72.854884112514 | 1994 | 91.224695585997 | 1993 | 92.34593509535 | 1992 | 85.951195219124 | 1991 | 73.142225497421 | 1990 | 78.020559322855 | 1989 | 68.628724178356 | 1988 | 65.9129849707 | 1987 | 68.933216173528 | 1986 | 67.559943992238 | 1985 | 68.209527140416 | 1984 | 64.911638128376 | 1983 | 66.417795308339 | 1982 | 64.804053355392 | 1981 | 63.396362067726 | 1980 | 69.033383738513 |
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