Year	maximum value in 2004 = 100
2006	7.6762473016
2007	6.5033423206
2008	8.7973291296
2009	10.6298629741
2010	12.9403194854
2011	12.653732025
2012	12.1190684957
2013	17.1590063966
2014	13.3641654336
2015	11.609112324
2016	11.4523192496
2017	10.8702151016
2018	11.3208663435
2019	12.0822481088
2020	14.5453869944
2021	14.1337350129