Year	maximum value in 2004 = 100
2006	19.0829956463
2007	20.2069793125
2008	19.8307799932
2009	20.6304500625
2010	24.2391755783
2011	25.3102630196
2012	25.575157332
2013	25.0495697691
2014	26.0233703523
2015	26.0382126821
2016	27.7471735427
2017	29.7425825386
2018	29.1833504816
2019	31.1902991638
2020	32.2416827587
2021	28.5971618148