Year	scale 0 - 100
2004	71.42857107142856
2005	73.57142857142857
2006	73.69047607142856
2007	73.79310310344826
2008	74.94252793103448
2009	74.44444466666667
2010	76.83333400000001
2011	76.88888866666666
2012	76.55555533333333
2013	72.55208333333333
2014	71.71874999999997
2015	75.208353125
2016	74.16669375000001
2017	75.729175
2018	76.04168437499997
2019	74.89583749999997
2020	73.541671875