Year	% (cumulative)
1981	63.9000015258789
2005	89.4355392456055
2006	94.5828399658203
2007	90.713508605957
2008	91.0323181152344
2010	91.237548828125
2014	92.9754028320312
2015	93.7157669067383
2016	89.1640930175781
2017	94.1833190917969
2018	94.7357482910156
2019	95.2994689941406
2020	95.2883071899414
2021	95.9393463134766
2022	96.4578399658203