Year	maximum value in 2004 = 100
2006	8.1402441345
2007	9.4931578656
2008	8.7440647064
2009	8.1371330395
2010	7.6635518017
2011	7.558767567
2012	7.7836635669
2013	9.029053744
2014	9.6371961532
2015	11.7443999601
2016	11.2942514557
2017	11.3430275512
2018	13.1612489073
2019	12.191119859
2020	13.8044915393
2021	14.6716584186