Year	% (cumulative)
1971	29.8847198486328
1981	45.516731262207
1991	59.6620483398438
2006	82.2895889282227
2007	82.0343704223633
2008	78.1245346069336
2009	78.9211502075195
2010	80.5259399414062
2011	82.3521423339844
2012	81.8495025634766
2013	82.8465728759766
2014	85.9441070556641
2015	86.2727508544922
2016	86.2515563964844
2017	85.0429611206055
2018	87.1326599121094
2019	86.9343032836914
2020	88.0078430175781
2021	89.5482711791992
2022	89.8707504272461