Year	scale 0 - 100
2004	75.94594567567569
2005	78.37837837837837
2006	77.92792756756758
2007	77.89473657894737
2008	77.71929815789474
2009	78.33333394736843
2010	80.43859710526316
2011	80.70175447368422
2012	80.61403473684211
2013	79.70085470085469
2014	79.01709401709401
2015	81.75004500000003
2016	81.41671250000005
2017	82.50002500000001
2018	83.50003500000001
2019	82.666695
2020	81.500025