Year 2015 = 100 1980 19.2189305371 1981 19.655022699 1982 18.1212279191 1983 18.7322319517 1984 17.9200628256 1985 15.0856464647 1986 17.563808232 1987 18.6987988299 1988 19.7246293659 1989 22.308845384 1990 22.285825856 1991 21.4319109974 1992 18.8926378664 1993 19.8525156296 1994 18.6708465465 1995 25.2389716858 1996 25.6645032385 1997 23.8530005806 1998 26.0037131881 1999 28.6730544027 2000 27.7513194155 2001 30.9185043479 2002 34.9933129991 2003 42.7302665999 2004 50.7408936391 2005 62.5107997416 2006 65.6078688009 2007 87.0613610947 2008 116.6611108109 2009 84.2287792875 2010 85.4680394322 2011 105.6039745082 2012 114.9921013376 2013 117.1003858909 2014 117.1489619114 2015 100 2016 97.9010704165 2017 120.2546070442 2018 144.251997712 2019 145.5445520455 2020 139.6239444182 2021 173.340609141