Year	maximum value in 2004 = 100
2006	7.9201772197
2007	8.720313515
2008	7.5392928438
2009	10.9524546627
2010	17.0302445449
2011	16.8424187598
2012	16.7564050035
2013	23.1018607732
2014	23.0730112961
2015	21.4290483364
2016	10.6873473635
2017	30.1916172547
2018	29.7320186909
2019	9.3094660098
2020	25.1249649889
2021	31.7069459582