Year	scale 0 - 100
2004	76.2893079245283
2005	78.86792433962265
2006	78.55345867924528
2007	78.45678981481481
2008	78.33333296296294
2009	79.01234592592593
2010	81.23456833333337
2011	81.60493796296298
2012	80.92592574074075
2013	79.01785714285711
2014	78.72023809523807
2015	81.34506842105264
2016	80.87722982456141
2017	82.22224736842108
2018	82.98248596491231
2019	81.98832982456142
2020	80.76025614035086