Year	scale 0 - 100
2004	66.7948717948718
2005	67.94871794871794
2006	67.56410256410257
2007	68.10126582278481
2008	68.86075949367088
2009	68.14814814814815
2010	67.28395061728395
2011	68.0246913580247
2012	66.41975308641975
2013	66.34146341463415
2014	66.58536585365853
2015	68.43373493975903
2016	69.27710843373494
2017	67.95180722891567
2018	62.16867469879518
2019	63.13253012048193
2020	60.36144578313253