Year	maximum value in 2004 = 100
2006	19.3024965529
2007	22.8960218579
2008	28.7499056349
2009	26.419423631
2010	27.9264050753
2011	31.8180718648
2012	46.001104389
2013	46.8225106714
2014	46.9700196669
2015	53.1217085969
2016	42.8443188085
2017	44.758409404
2018	43.5123570599
2019	37.4231312627
2020	34.6082954769
2021	31.655448741