Year 2010 = 100 1991 58.77865577014 1992 64.0333465431747 1993 69.295771661207 1994 69.1220176889965 1995 66.3516281558071 1996 67.9721674733785 1997 71.3999479722319 1998 70.9534069403458 1999 72.5074293125058 2000 73.0041842959311 2001 78.7289204020514 2002 86.8913651381382 2003 89.1550417389998 2004 94.8830642113863 2005 96.2232253446263 2006 91.6313789951925 2007 101.994220343668 2008 104.88651362115 2009 98.9832586500178 2010 100 2011 99.75363076051 2012 97.0296872251055 2013 96.0092081640737 2014 92.1278277179096 2015 88.3150439619624 2016 88.9871954412846 2017 90.7679542119781 2018 90.2882814743819 2019 89.0816395087017 2020 85.6702746026639 2021 86.096673276105 2022 82.142163379406 2023 94.7494050356706