Year	maximum value in 2004 = 100
2008	3.3819078579
2009	3.5526469381
2010	3.4628926147
2011	3.8942501171
2012	4.1090841527
2013	4.5579123703
2014	3.9560375928
2015	3.7626010182
2016	5.219392813
2017	3.1785110022
2018	3.0720506427
2019	5.4343356051
2020	5.4365316794
2021	4.4277308052