Year	% (cumulative)
1981	27.2999992370605
1991	37.4000015258789
2005	58.2926902770996
2006	61.9432182312012
2007	61.5620307922363
2008	62.0254783630371
2010	63.1490783691406
2014	67.5204162597656
2015	69.1706924438477
2016	64.8029022216797
2017	71.5808258056641
2018	72.2671203613281
2019	72.8347549438477
2020	73.6619491577148
2021	75.6184005737305
2022	76.9786529541016