Year	maximum value in 2004 = 100
2006	71.3534968946
2007	71.8193322908
2008	71.2598189741
2009	72.8800010956
2010	74.377669233
2011	75.8976132161
2012	71.7910622639
2013	71.0252945456
2014	78.6839083592
2015	83.1230620332
2016	83.6924782318
2017	85.3218465722
2018	83.9514136749
2019	87.7889545244
2020	89.387516227
2021	90.4670153624