Year	% (cumulative)
1972	22.6604595184326
1982	34.8305206298828
1992	48.0434188842773
2001	56.5099983215332
2002	58.2000007629395
2003	60.6300010681152
2004	61.2599983215332
2005	64.4800033569336
2006	64.5299987792969
2007	66.120002746582
2008	67.75
2009	69.2799987792969
2010	69.2799987792969
2011	71.1600036621094
2012	70.9899978637695
2013	74.0899963378906
2014	74.5800018310547
2015	75.9599990844727
2016	74.4700012207031
2017	75.3399963378906
2018	75.5699996948242
2019	76.2799987792969
2020	77.3899993896484
2021	78.4000015258789
2022	80.4199981689453