Year Index 2009-01-01 52.9253 2010-01-01 44.8552 2011-01-01 36.4958 2012-01-01 35.5679 2013-01-01 33.4951 2014-01-01 29.1990 2015-01-01 29.1839 2016-01-01 25.2540 2017-01-01 22.9421