Year	% (cumulative)
1970	74.1952285766602
1981	53.0862808227539
1986	54.5
2004	86.6287384033203
2005	85.9474563598633
2006	86.5810623168945
2007	86.9558563232422
2008	87.4016494750977
2009	87.5390701293945
2010	88.210693359375
2011	88.523551940918
2012	89.1230926513672
2013	97.9573593139648
2014	90.1487197875977
2015	90.4641036987305
2016	91.1201019287109
2017	92.002311706543
2018	91.9167175292969
2019	93.140251159668
2020	93.2168121337891
2021	94.0569610595703
2022	94.3458557128906