Year	% (cumulative)
1981	36.4888916015625
2001	76.7454605102539
2008	75.4756393432617
2009	75.5258102416992
2010	57.0533027648926
2011	58.6750144958496
2013	60.4662628173828
2014	61.6334991455078
2015	62.2136344909668
2016	81.5662384033203
2017	82.3454666137695
2018	82.89404296875
2019	82.0564270019531
2020	84.235221862793
2021	83.2864532470703
2022	83.0905380249023