Quarter	Index source base
2015-01-01	99.989367810000
2015-04-01	99.989367810000
2015-07-01	100.975690340000
2015-10-01	102.948335400000
2016-01-01	102.984407100000
2016-04-01	102.984407300000
2016-07-01	103.860874133333
2016-10-01	105.609205066667
2017-01-01	105.400000000000
2017-04-01	105.400000000000
2017-07-01	106.433333333333
2017-10-01	108.500000000000
2018-01-01	108.600000000000
2018-04-01	108.600000000000
2018-07-01	108.600000000000