Year	% (cumulative)
1971	63.8969612121582
2001	89.881591796875
2005	89.6761932373047
2006	90.081169128418
2007	90.2476196289062
2008	90.7640914916992
2009	91.2734375
2010	91.61376953125
2011	92.0078506469727
2012	92.5458908081055
2013	93.4380645751953
2014	93.4437637329102
2015	93.7325820922852
2016	94.688102722168
2017	95.1237335205078
2018	95.5895538330078
2019	95.9255828857422
2020	95.6621932983398
2021	96.7913513183594
2022	96.9105377197266