Year	maximum value in 2004 = 100
2006	9.0053629109
2007	8.536042726
2008	11.0391854945
2009	13.723934734
2010	13.7328050316
2011	14.5325655077
2012	15.3299175835
2013	14.9853670844
2014	19.2028831304
2015	17.068693564
2016	17.2752862633
2017	16.1343177118
2018	14.1867017714
2019	15.6923700807
2020	14.5947789863
2021	22.1821681964