Year	% (cumulative)
1970	94.7741012573242
2006	93.6534118652344
2007	93.7341995239258
2008	94.3770523071289
2009	94.5121688842773
2010	93.9965667724609
2011	94.0572280883789
2012	93.9065780639648
2013	94.2144165039062
2014	94.9072418212891
2015	95.9163513183594
2016	96.4410095214844
2017	96.4327697753906
2018	96.7928466796875
2019	97.1668930053711
2020	97.1702194213867
2021	97.2008895874023
2022	97.0625991821289