Year	% (cumulative)
1970	94.4913787841797
1980	96.4301605224609
1994	99.4304656982422
1995	99.4630661010742
1996	99.4478225708008
1997	99.4800262451172
1998	99.4993133544922
1999	99.5353622436523
2000	99.5257339477539
2001	99.5152893066406
2002	99.5295028686523
2003	99.5328369140625
2004	98.5569381713867
2005	98.4229583740234
2006	98.541259765625
2007	99.5861663818359
2008	98.6767272949219
2009	98.5941772460938
2010	98.6884307861328
2011	98.7173004150391
2012	98.7904815673828
2013	98.8670196533203
2014	98.7934112548828
2015	98.7738800048828
2016	98.8771133422852
2017	97.5959396362305
2018	99.0315322875977
2019	99.6493682861328
2020	99.055778503418
2021	97.2861862182617
2022	99.0264892578125
2023	99.6513290405273