Year	maximum value in 2004 = 100
2006	17.5269521879
2007	17.0637534565
2008	19.1098528283
2009	22.0647736757
2010	22.4122789396
2011	28.9990470286
2012	28.4174462947
2013	28.5912329011
2014	29.0461566607
2015	29.8715693776
2016	34.7454587829
2017	35.8537436825
2018	36.1605769121
2019	36.7149125003
2020	36.215161659
2021	36.2862939823