Year	% (cumulative)
1970	27.5836696624756
1975	35.5999984741211
1980	45.8061408996582
1990	67.3000030517578
1995	71.9248504638672
2000	77.0457382202148
2003	79.7032165527344
2004	80.4577331542969
2005	80.4800109863281
2006	81.9552001953125
2007	82.5709075927734
2008	82.9678268432617
2009	77.8654174804688
2010	82.9011688232422
2011	84.1607894897461
2012	84.7721786499023
2013	85.2677459716797
2014	86.0320358276367
2015	85.7208404541016
2016	87.1409454345703
2017	87.3605194091797
2018	87.5821838378906
2019	87.8838653564453
2020	88.0985565185547
2021	88.5332107543945
2022	88.8400955200195