Year	scale 0 - 100
2004	75.833333125
2005	80.416249375
2006	82.29145812499999
2007	82.291250625
2008	83.54124999999999
2009	85.207915625
2010	85.8329175
2011	87.083334375
2012	86.04166562500001
2013	80.19607843137253
2014	80.21568627450978
2015	77.84315882352941
2016	80.3921705882353
2017	82.74511764705882
2018	82.9412
2019	80.9804
2020	80.58824117647059