Year	maximum value in 2004 = 100
2006	7.5269663698
2007	7.3974169012
2008	8.1168771827
2009	10.4811635317
2010	10.1888692597
2011	12.9304214178
2012	10.951455898
2013	11.2601483412
2014	14.1115845615
2015	11.3118621502
2016	13.4030649116
2017	17.2272208354
2018	21.9265579829
2019	14.4792381443
2020	14.1729792237
2021	23.9768820796