Year	maximum value in 2004 = 100
2006	11.7983028619
2007	12.8256055786
2008	13.743541823
2009	12.6271862421
2010	12.0749195214
2011	13.1081636744
2012	16.9106501061
2013	18.7806073638
2014	20.8151656883
2015	19.0704124694
2016	25.973572254
2017	25.2631975236
2018	23.5562742961
2019	29.7547292976
2020	24.8303027392
2021	24.011206608