Year	% (cumulative)
1970	94.4858474731445
2006	92.4834671020508
2007	92.1879653930664
2008	93.0106506347656
2009	93.2641372680664
2010	92.6636505126953
2011	92.9185104370117
2012	92.4942398071289
2013	93.0323715209961
2014	93.8728332519531
2015	95.0690612792969
2016	95.6992492675781
2017	95.8703308105469
2018	96.3588638305664
2019	96.7423629760742
2020	96.8622970581055
2021	96.8185195922852
2022	96.6435775756836