Year	% (cumulative)
1972	20.7653408050537
1982	32.5647583007812
1992	45.9403190612793
2001	54.2900009155273
2002	57.0299987792969
2003	58.8499984741211
2004	59.2200012207031
2005	61.8300018310547
2006	62.4500007629395
2007	63.7799987792969
2008	65.5299987792969
2009	68.5999984741211
2010	67.4199981689453
2011	70.2300033569336
2012	69.9300003051758
2013	73.4599990844727
2014	73.7600021362305
2015	74.6699981689453
2016	73.5299987792969
2017	74.3099975585938
2018	74.5599975585938
2019	75.2099990844727
2020	76.0800018310547
2021	77.3300018310547
2022	80.4100036621094