Year	% (cumulative)
1971	74.7126312255859
2001	94.4655990600586
2005	95.0474624633789
2006	95.2717666625977
2007	95.4199676513672
2008	95.6572189331055
2009	95.7640762329102
2010	95.9849014282227
2011	96.1425704956055
2012	96.41015625
2013	96.6338806152344
2014	96.7152404785156
2015	96.9545593261719
2016	97.4069900512695
2017	97.6061782836914
2018	97.7872009277344
2019	97.919075012207
2020	97.8914794921875
2021	98.3558959960938
2022	98.4543991088867