Year	% (cumulative)
1970	33.8746490478516
2006	76.7874526977539
2007	77.6703567504883
2008	78.3239135742188
2009	79.4299163818359
2010	79.641487121582
2011	80.1013717651367
2012	80.2901916503906
2013	81.5879364013672
2014	82.3405303955078
2015	84.3579177856445
2016	84.7895202636719
2017	86.5041732788086
2018	87.6263275146484
2019	88.4269638061523
2020	89.1208648681641
2021	89.246940612793
2022	89.5966262817383