Year	scale 0 - 100
2004	80.42735051282051
2005	82.05128205128206
2006	81.79487153846154
2007	80.66666649999999
2008	80.58333299999998
2009	80.48780512195123
2010	81.21951268292683
2011	81.86991853658535
2012	81.5447156097561
2013	81.30081300813012
2014	80.97560975609755
2015	83.2540047619048
2016	81.90478333333337
2017	84.44445476190477
2018	84.60320476190475
2019	83.96828809523808
2020	82.38098571428574