Year	scale 0 - 100
2004	73.83838363636364
2005	76.16161606060608
2006	76.06060575757576
2007	76.37254882352943
2008	76.66666676470587
2009	77.14285771428573
2010	79.42857200000002
2011	80.76190457142859
2012	79.99999914285712
2013	78.75000000000001
2014	77.63888888888889
2015	80.9259638888889
2016	80.46299722222226
2017	80.83335277777778
2018	81.85188888888891
2019	80.74077500000001
2020	79.81484444444443