Year	maximum value in 2004 = 100
2006	12.8012636579
2007	12.252566529
2008	12.4112547388
2009	16.0387441143
2010	14.7757952622
2011	13.7653922331
2012	13.4548673918
2013	14.915485345
2014	20.0412759994
2015	26.5258780484
2016	33.1634555371
2017	33.6902673106
2018	33.9240085028
2019	34.6097386822
2020	36.572261736
2021	36.2431858825