Year 2015 = 100 1995 29.3309456866 1996 40.1370835606 1997 33.9621476326 1998 21.6122757709 1999 27.7872117046 2000 28.5590786956 2001 24.6997437377 2002 21.6122757709 2003 24.6997437377 2004 37.0496155966 2005 91.5434252127 2006 36.1233752188 2007 33.1439037822 2008 50.2045570857 2009 42.5836842565 2010 37.5203309582 2011 56.6857050262 2012 60.1092948116 2013 79.2804177365 2014 74.2930331298 2015 100 2016 89.0919756707 2017 59.6884744738 2018 63.787088214 2019 76.8609712983 2020 34.1751829378 2021 42.4526845336