Year	% (cumulative)
1972	1.24242997169495
1983	3.58080005645752
1990	1.89999997615814
2000	7.91396999359131
2011	12.6566600799561
2012	16.2503242492676
2013	18.4986476898193
2014	19.3394145965576
2015	19.5392513275146
2016	19.6669979095459
2017	19.647590637207
2018	20.8959922790527
2019	22.0615253448486
2020	19.7982959747314
2021	0