Year	maximum value in 2004 = 100
2006	16.2406050355
2007	14.7293437557
2008	18.3690516107
2009	20.6139570994
2010	25.6176815296
2011	25.1548660741
2012	20.9551900149
2013	21.9222834872
2014	22.0757895852
2015	29.3648607352
2016	29.6536559386
2017	32.0022092183
2018	24.7554165232
2019	32.5652828261
2020	38.0043442688
2021	37.3784534267