Year	Percent Change From Preceding Period
2012-01-01	45.077818214581900
2013-01-01	-0.039078952897804
2014-01-01	1.656140516107890
2015-01-01	52.813067312459700
2016-01-01	379.848504214104000
2017-01-01	187.867149549871000
2018-01-01	106.358851103520000
2019-01-01	91.388507967827700