Year	Index
2008-01-01	5.23082
2009-01-01	12.39290
2010-01-01	2.39438
2011-01-01	4.71085
2012-01-01	7.57177
2013-01-01	8.14718
2014-01-01	13.14620
2015-01-01	22.20870
2016-01-01	21.81650
2017-01-01	27.86640