Year	% (cumulative)
1971	10
2001	50.9081077575684
2002	52.0285224914551
2003	53.9032096862793
2004	58.6276817321777
2005	60.2878189086914
2006	62.5840187072754
2007	64.1781692504883
2008	67.1775436401367
2009	68.2333297729492
2010	70.6021575927734
2011	72.6381225585938
2012	75.0021133422852
2013	70.1196823120117
2014	70.9758834838867
2015	73.3811569213867
2016	74.5720672607422
2017	75.5375595092773
2018	76.8862609863281
2019	77.8000411987305
2020	79.1370391845703
2021	79.7762832641602
2022	80.7137603759766