Year | Value | 2022 | 82.543317993926 | 2021 | 81.3369721948 | 2020 | 83.012800809098 | 2019 | 82.304321867845 | 2018 | 83.243715581433 | 2017 | 84.029539208169 | 2016 | 85.624779986451 | 2015 | 86.922639920446 | 2014 | 89.005148726261 | 2013 | 91.860933225792 | 2012 | 92.402457905901 | 2011 | 93.969440815441 | 2010 | 92.408430877023 | 2009 | 93.122069397398 | 2008 | 94.842458962325 | 2007 | 93.54411302018 | 2006 | 93.215243259762 | 2005 | 90.717089178986 | 2004 | 91.822207691898 | 2003 | 90.458895275011 | 2002 | 90.795537231555 | 2001 | 88.749004348042 | 2000 | 90.778563237184 | 1999 | 89.466150980421 | 1998 | 90.632873439426 | 1997 | 91.00051433035 | 1996 | 93.446209439426 | 1995 | 92.144946730703 | 1994 | 95.279860047357 | 1993 | 98.137623464708 | 1992 | 96.851902319684 | 1991 | 96.479188667344 | 1990 | 96.835433166564 | 1989 | 96.138796545653 | 1988 | 95.999082799791 | 1987 | 92.70760085436 | 1986 | 96.089432301544 | 1985 | 93.729750011838 | 1984 | 95.395108789485 | 1983 | 96.28076570331 | 1982 | 93.562977506017 | 1981 | 93.959475989669 | 1980 | 96.971080028328 | 1979 | 91.294116977918 | 1978 | 91.506162131321 | 1977 | 86.436573042644 | 1976 | 86.585200169195 | 1975 | 82.96260125984 | 1974 | 79.614956926813 | 1973 | 86.361447872327 | 1972 | 82.563084920148 | 1971 | 86.024784395006 | 1970 | 83.797980195312 | 1969 | 89.340254035005 | 1968 | 90.299398656136 | 1967 | 82.893270831503 | 1966 | 84.411577895714 | 1965 | 84.995506093142 | 1964 | 87.47445418227 | 1963 | 87.453070838849 | 1962 | 87.669035698449 | 1961 | 85.757649976673 | 1960 | 85.535335892718 |
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