Year 2015 = 100 2011 128.9756355959 2012 128.1769305268 2013 97.3672569856 2014 101.0634332293 2015 100 2016 106.4612814953 2017 92.4283957524 2018 107.9041228915 2019 77.4977332685 2020 67.1430794442 2021 52.5571899657