Year	% (cumulative)
1977	44.4000015258789
1992	70.1603622436523
2002	79.1825180053711
2006	85.1092758178711
2007	85.6570587158203
2008	86.3639831542969
2009	86.7814712524414
2010	87.2773818969727
2011	88.2002182006836
2012	88.9144134521484
2013	89.4360809326172
2014	89.0505218505859
2015	89.4869079589844
2016	90.0044097900391
2017	90.5290374755859
2018	91.0828475952148
2019	91.1620101928711
2020	91.8021926879883
2021	92.5530776977539
2022	92.9472579956055