Year	% (cumulative)
1970	13.0150699615479
1980	24.6463508605957
1990	34.740909576416
2001	48.9869384765625
2005	57.3790817260742
2009	70.5477676391602
2010	71.7456588745117
2011	72.9343185424805
2012	74.1261978149414
2013	75.0872192382812
2014	69.8358688354492
2015	71.0691375732422
2016	71.9458236694336
2017	72.7215194702148
2018	74.1217422485352
2019	74.8736343383789
2020	76.3722534179688
2021	78.3826751708984
2022	79.8717956542969