Year	% (cumulative)
1970	79.2475967407227
1980	86.2204895019531
2001	83.760871887207
2005	88.0102920532227
2009	97.0151977539062
2010	97.3893280029297
2011	97.7884063720703
2012	97.8899230957031
2013	98.0169677734375
2014	95.5639801025391
2015	95.7299499511719
2016	96.2648773193359
2017	96.6059036254883
2018	96.8993148803711
2019	97.164665222168
2020	97.6131362915039
2021	98.0978240966797
2022	98.2849807739258