Year	% (cumulative)
1970	2.84406995773315
1980	5.01446008682251
1990	8.69182968139648
2001	11.6421203613281
2005	14.2742500305176
2009	19.9431991577148
2010	20.3139991760254
2011	21.4132900238037
2012	22.7495498657227
2013	23.2884502410889
2014	21.8201293945312
2015	22.7439804077148
2016	22.4317493438721
2017	22.6007175445557
2018	23.9644412994385
2019	25.4416961669922
2020	26.6702995300293
2021	28.7157535552979
2022	28.9740505218506