Year	% (cumulative)
1970	31.728479385376
1978	45.925708770752
1988	61.4694213867188
2006	98.8971252441406
2007	99.0251617431641
2008	82.6541519165039
2009	83.5013427734375
2010	84.3208618164062
2011	84.9672470092773
2012	85.5134887695312
2013	86.2419204711914
2014	86.9440765380859
2015	98.6479721069336
2016	88.0800933837891
2017	98.7234497070312
2018	98.6530685424805
2019	98.5505523681641
2020	90.7297821044922
2021	98.3862915039062
2022	98.463752746582