Year	maximum value in 2004 = 100
2006	10.8384840787
2007	11.9060438305
2008	8.3794991584
2009	8.8983950748
2010	8.512227467
2011	5.5149514167
2012	8.7757457375
2013	14.3707872755
2014	17.1036564917
2015	13.3842010848
2016	9.0313953229
2017	13.3524254804
2018	13.0907833848
2019	12.9710479053
2020	12.4010752455
2021	12.3715284858