Year	maximum value in 2004 = 100
2006	12.645974846
2007	12.3310106699
2008	10.6427052435
2009	11.800751538
2010	12.2283306725
2011	14.0512156754
2012	13.1727189985
2013	15.1680140495
2014	13.8426477693
2015	18.1086815554
2016	15.4285168573
2017	14.7162272078
2018	16.9878829883
2019	16.0268081861
2020	15.6559319296
2021	15.8095346846