Year	maximum value in 2004 = 100
2006	14.5301604248
2007	14.2537067958
2008	15.3459155095
2009	15.2692764406
2010	14.5169036808
2011	16.7353542548
2012	16.5792427676
2013	16.2851776808
2014	16.7541583881
2015	13.5363213846
2016	16.780951793
2017	15.3811266707
2018	24.4495545809
2019	15.4146205335
2020	18.9457722405
2021	18.5331935606