Year	maximum value in 2004 = 100
2006	24.8042074378
2007	25.4704940511
2008	27.1612413812
2009	28.3677640905
2010	30.8974613316
2011	27.6396873063
2012	26.8242990959
2013	28.005252695
2014	28.4684041996
2015	33.7454606614
2016	33.6725952362
2017	33.9301487108
2018	33.9856262663
2019	33.9377934075
2020	40.782383784
2021	34.1095612091