Year | Value | 2020 | 88.03360545296 | 2019 | 87.343206891341 | 2018 | 86.125273408007 | 2017 | 86.407942861086 | 2016 | 91.86001970012 | 2015 | 93.014673918294 | 2014 | 94.393064170634 | 2013 | 92.388630336851 | 2012 | 88.281043877258 | 2011 | 86.576050187588 | 2010 | 96.015463205854 | 2009 | 94.504376772285 | 2008 | 95.170407315046 | 2007 | 93.113299751898 | 2006 | 96.774536938471 | 2005 | 98.508287292818 | 2004 | 88.960575523138 | 2003 | 83.575757575758 | 2002 | 104.71293321501 | 2001 | 122.09791892217 | 2000 | 107.36933703974 | 1999 | 93.429765613687 | 1998 | 97.887770695197 | 1997 | 112.61153664318 | 1996 | 117.57702365929 | 1995 | 113.89246674822 | 1994 | 126.63280138003 | 1993 | 140.29428003009 | 1992 | 128.71937424612 | 1991 | 157.83965272039 | 1990 | 150.17142989903 | 1989 | 180.09328291927 | 1988 | 199.69932155748 | 1987 | 138.68877177098 | 1986 | 178.54342678144 | 1985 | 228.88255103486 | 1984 | 228.7379271594 | 1983 | 228.68987614548 | 1982 | 228.47635069739 | 1981 | 228.950855976 | 1980 | 228.68724668427 |
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