Year	% (cumulative)
1972	0.476249992847443
1983	1.93703997135162
1990	0.899999976158142
2000	6.16514015197754
2011	10.5786199569702
2012	13.474422454834
2013	16.0942516326904
2014	16.7118263244629
2015	17.3475608825684
2016	16.9965438842773
2017	17.6366405487061
2018	18.7944049835205
2019	19.4548683166504
2020	18.535457611084
2021	0