Year	Percent Change From Preceding Period
2012-01-01	25.23907310339030
2013-01-01	-8.78663701711408
2014-01-01	9.88023758587927
2015-01-01	109.85647903064500
2016-01-01	479.73493599410000
2017-01-01	117.67047388062900
2018-01-01	99.35657667158050
2019-01-01	92.71591998309880