Year	% (cumulative)
1970	26.1000003814697
1978	39.5999984741211
1988	55.6967010498047
2006	98.2538452148438
2007	98.4396362304688
2008	78.8859786987305
2009	79.9776000976562
2010	80.9015502929688
2011	81.6829223632812
2012	82.2974166870117
2013	83.1423492431641
2014	83.8526306152344
2015	98.0300598144531
2016	85.3279266357422
2017	98.1832275390625
2018	98.2386627197266
2019	98.2505493164062
2020	88.5085830688477
2021	97.9603424072266
2022	98.0690765380859