Year	maximum value in 2004 = 100
2006	13.4430150297
2007	13.572184053
2008	13.7025685992
2009	16.0825996528
2010	15.3336111726
2011	15.4927237614
2012	19.2942747925
2013	19.4019161092
2014	22.3164471107
2015	20.7492970884
2016	26.6666499601
2017	25.08878115
2018	23.4332774455
2019	30.4678320108
2020	23.6039730155
2021	23.3879860863