Year	% (cumulative)
1971	19.4962100982666
1981	39.5932388305664
2011	78.7954025268555
2014	89.5446929931641
2017	83.9569778442383
2018	84.76025390625
2019	83.6519546508789
2020	83.5632247924805
2021	85.8514404296875
2022	87.5089111328125