Year	% (cumulative)
1971	30.7611999511719
1981	48.8126907348633
2006	89.9091796875
2008	90.7491912841797
2009	91.1951522827148
2010	91.2860336303711
2011	91.8467025756836
2014	93.0020980834961
2015	93.4399185180664
2017	93.9081268310547
2019	94.0477600097656
2022	94.6763916015625