Year	maximum value in 2004 = 100
2006	11.3359491022
2007	12.5531929751
2008	9.9445377398
2009	9.7255056646
2010	8.1669493642
2011	7.6828937125
2012	12.0651438684
2013	11.2883106334
2014	12.3210772592
2015	12.5763299965
2016	11.8405380622
2017	11.5953402053
2018	14.1288440191
2019	13.8876428623
2020	12.7039097072
2021	12.4432964442