Year	maximum value in 2004 = 100
2006	10.8572465
2007	12.0993961939
2008	11.7126058323
2009	10.4637359613
2010	10.3458246048
2011	10.6060389563
2012	11.4003965445
2013	10.986948668
2014	9.1360390703
2015	12.2773053483
2016	12.5116920174
2017	13.1012124401
2018	10.0278304544
2019	14.5416604428
2020	13.8658888882
2021	14.3342341331