Year	maximum value in 2004 = 100
2006	11.0923192249
2007	12.1658028036
2008	15.3460483553
2009	17.2189557097
2010	18.8660759938
2011	17.6988066185
2012	18.6856655967
2013	20.5761772737
2014	20.6882564869
2015	27.5611269817
2016	30.6908260079
2017	30.6411184797
2018	29.4808182648
2019	33.7426165856
2020	33.5724631086
2021	33.5866263753