Year	maximum value in 2004 = 100
2006	27.7890340984
2007	27.422559468
2008	36.3874803654
2009	44.9680091542
2010	42.9773046589
2011	44.4184637548
2012	43.896408517
2013	45.1675826324
2014	44.3966010286
2015	45.1662953132
2016	43.6354954045
2017	46.479816087
2018	59.7446333391
2019	44.1828909781
2020	56.3380383782
2021	61.1987768332