Year	maximum value in 2004 = 100
2006	16.6731276695
2007	17.0525658031
2008	15.9720925135
2009	12.7593268389
2010	12.4214156216
2011	11.2951354335
2012	16.6679652622
2013	17.5617983418
2014	20.4970101534
2015	15.8073075719
2016	9.0449049735
2017	8.7562393536
2018	5.9359060624
2019	7.8492034714
2020	7.7538472178
2021	6.562284732