Year	scale 0 - 100
2004	63.75
2005	64.375
2006	64.375
2007	65.22123893805309
2008	66.10619469026548
2009	66.40350877192982
2010	66.2280701754386
2011	66.57894736842105
2012	65.78947368421052
2013	65.25862068965517
2014	64.91379310344827
2015	65.55555555555556
2016	66.4957264957265
2017	65.04273504273505
2018	59.401709401709404
2019	60.94017094017094
2020	57.77777777777778