Year	maximum value in 2004 = 100
2006	24.5253019058
2007	25.8933622123
2008	23.5348827696
2009	27.1168604641
2010	26.2849252569
2011	35.6222841519
2012	35.1877821098
2013	35.101376901
2014	38.7924016857
2015	37.3877940352
2016	37.4882125224
2017	40.117535113
2018	41.9135848433
2019	43.173141922
2020	33.1775818259
2021	41.5526769385