Year	% (cumulative)
1971	22.6160793304443
1980	27.261510848999
2006	80.1965789794922
2007	71.6986236572266
2008	71.8789367675781
2009	72.8547897338867
2011	74.4377136230469
2012	75.1071472167969
2013	76.4438934326172
2014	76.6004180908203
2015	77.6303482055664
2016	80.2382736206055
2017	77.6787490844727
2018	78.4278793334961
2019	80.3892059326172
2020	81.9337005615234
2021	84.9264144897461
2022	83.2264404296875