;Index;Per cent changes;Per cent changes; Last quarter change;Last year change; 2nd quarter 2015;113.6;0.7;2.3; 3rd quarter 2015;113.6;0.0;2.3; 4th quarter 2015;113.4;-0.1;1.3; 1st quarter 2016;113.6;0.2;0.8; 2nd quarter 2016;113.7;0.1;0.1; 3rd quarter 2016;114.4;0.6;0.7; 4th quarter 2016;113.6;-0.7;0.2; 1st quarter 2017;115.6;1.8;1.7; 2nd quarter 2017;115.1;-0.4;1.2;