Year	maximum value in 2004 = 100
2006	10.7038808262
2007	11.9397164239
2008	13.8823161102
2009	11.9384099985
2010	11.5515043468
2011	12.5118889398
2012	12.0754967988
2013	13.9049689788
2014	11.9318292736
2015	10.7872457028
2016	11.0928747116
2017	11.4388209609
2018	9.6555908805
2019	9.6562973607
2020	9.258095718
2021	10.3117025328