Year	% (cumulative)
1971	38.5288581848145
2001	83.4497985839844
2010	80.1678009033203
2011	81.7636489868164
2013	82.4223937988281
2014	83.3614883422852
2015	83.6668243408203
2016	83.732421875
2017	84.4906463623047
2018	84.949836730957
2019	85.6703796386719
2020	85.7766494750977