Year	% (cumulative)
1972	2.02169990539551
1983	5.38401985168457
1990	2.93134999275208
2000	9.74287986755371
2011	14.8544702529907
2012	19.1750087738037
2013	21.0418834686279
2014	22.1300792694092
2015	21.870698928833
2016	22.5053634643555
2017	21.7921848297119
2018	23.1407642364502
2019	24.8515625
2020	21.0858860015869
2021	0