Year	% (cumulative)
1970	85.3530120849609
1980	90.7436828613281
2001	98.4574737548828
2005	98.9780807495117
2013	99.6455612182617
2014	99.5173797607422
2015	99.5505981445312
2016	99.5666732788086
2017	99.59912109375
2018	99.6308898925781
2019	99.6030044555664
2020	99.6724624633789
2021	99.638053894043
2022	99.7002792358398