Year	% (cumulative)
1970	93.8855590820312
1980	96.1880187988281
1994	99.4442749023438
1995	99.4819412231445
1996	99.4681930541992
1997	99.4907073974609
1998	99.5255355834961
1999	99.5877685546875
2000	99.5449676513672
2001	99.5451507568359
2002	99.5426254272461
2003	99.551139831543
2004	98.3899383544922
2005	98.3439407348633
2006	98.4368515014648
2007	99.5798950195312
2008	98.6171188354492
2009	98.5647964477539
2010	98.6701889038086
2011	98.731819152832
2012	98.7496109008789
2013	98.8650588989258
2014	98.8226089477539
2015	98.7804336547852
2016	98.8551330566406
2017	97.6035385131836
2018	99.0813293457031
2019	99.6698379516602
2020	99.0209426879883
2021	97.2186889648438
2022	98.9535827636719
2023	99.6895904541016