Year maximum value in 2004 = 100 2006 79.7430886401 2007 76.2482120313 2008 75.4273431808 2009 74.8860409869 2010 79.088463573 2011 76.8960878468 2012 86.2018362474 2013 88.8347867502 2014 85.5823390349 2015 87.1968295944 2016 82.0461664838 2017 85.6698777328 2018 92.0496648498 2019 95.6156319109 2020 103.852253372 2021 102.6129324202