Year	% (cumulative)
1991	46.8799705505371
2001	71.189208984375
2006	72.772331237793
2011	67.992919921875
2012	68.7553405761719
2014	69.4948272705078
2015	69.6625366210938
2016	70.0286712646484
2017	72.5782928466797
2018	74.120964050293
2019	73.9925003051758
2020	75.1135864257812