Year	maximum value in 2004 = 100
2006	10.7357903988
2007	10.9547507296
2008	13.4903376569
2009	11.1760181512
2010	8.6726547181
2011	9.3402499183
2012	11.2382036199
2013	10.2624647062
2014	11.2769300439
2015	10.534557263
2016	9.9836708906
2017	12.8016919755
2018	11.7004154121
2019	11.5408750931
2020	11.2828322066
2021	10.2288898332