Year maximum value in 2004 = 100 2010 1.0926546335 2011 1.0926546335 2013 1.2086454889 2014 2.0865640586 2015 2.0865640586 2016 1.7198498418 2017 1.7007007539 2018 1.8513339985 2019 1.7007007539