Year	maximum value in 2004 = 100
2006	26.3716182217
2007	29.6366789682
2008	33.1865023922
2009	32.8423800076
2010	35.9977681732
2011	39.8510538748
2012	42.511551964
2013	43.4136545796
2014	42.4348955771
2015	50.3897000777
2016	47.5068360076
2017	47.8769957005
2018	47.3881427344
2019	50.0015967653
2020	50.0396510643
2021	51.5962899016