Year 2000 = 100 1980 128 1981 132 1982 128 1983 123 1984 127 1985 122 1986 125 1987 137 1988 156 1989 159 1990 156 1991 157 1992 153 1993 147 1994 151 1995 162 1996 141 1997 128 1998 102 1999 100 2000 100 2001 84.2295659 2002 80.81510785 2003 82.99915767 2004 91.66014861 2005 95.73794411 2006 94.20219007 2007 94.7670046 2008 98.48003971 2009 84.05508258 2010 90.25149665 2011 94.43984838 2012 90.63656328 2013 89.30161547 2014 87.36876147 2015 77.11861857 2016 72.62416895 2017 79.10787882 2018 81.30922656