Year	maximum value in 2004 = 100
2006	13.4696492614
2007	14.941001965
2008	10.163355621
2009	20.7932847066
2010	17.432597585
2011	16.3107712727
2012	19.131408876
2013	20.0164023612
2014	21.555317361
2015	26.5796348276
2016	31.5958991857
2017	27.376175795
2018	31.8226423438
2019	32.6985958249
2020	32.4964394701
2021	34.1327668846