Year | Value | 2022 | 65.957257284371 | 2021 | 66.695840817812 | 2020 | 66.030876414295 | 2019 | 69.525069616668 | 2018 | 67.421229569008 | 2017 | 68.298984898842 | 2016 | 66.240141895644 | 2015 | 67.461078124788 | 2014 | 67.863670288239 | 2013 | 67.766844461911 | 2012 | 69.363256921825 | 2011 | 69.736207001501 | 2010 | 68.252162626851 | 2009 | 67.682535515393 | 2008 | 69.223957204827 | 2007 | 68.331609058129 | 2006 | 70.39892412724 | 2005 | 76.428739803915 | 2004 | 77.758157706657 | 2003 | 79.281841084059 | 2002 | 77.965757915268 | 2001 | 78.363819027802 | 2000 | 77.122553627906 | 1999 | 80.049590809392 | 1998 | 81.1757729213 | 1997 | 79.646854237167 | 1996 | 79.674710363198 | 1995 | 80.586794489378 | 1994 | 81.408767219875 | 1993 | 83.426224583344 | 1992 | 85.126854665023 | 1991 | 89.618191687971 | 1990 | 88.440718416256 | 1989 | 87.551495186031 | 1988 | 90.903157492551 | 1987 | 92.423316727254 | 1986 | 87.895704646425 | 1985 | 87.943355679913 | 1984 | 90.65438847744 | 1983 | 92.133869601353 | 1982 | 93.876530335051 | 1981 | 95.183830911765 | 1980 | 93.043081913131 | 1979 | 88.76075100075 | 1978 | 90.951076127569 | 1977 | 88.818561891784 | 1976 | 86.898465741985 | 1975 | 88.291098677 | 1974 | 72.450034481413 | 1973 | 79.804311600841 | 1972 | 85.820808485249 | 1971 | 87.918058428451 | 1970 | 79.376712874619 |
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