Year	% (cumulative)
1972	24.7205390930176
1982	37.1264305114746
1992	50.1443481445312
2001	58.8699989318848
2002	59.3899993896484
2003	62.4799995422363
2004	63.3300018310547
2005	67.2300033569336
2006	66.7399978637695
2007	68.6100006103516
2008	70.0400009155273
2009	69.9700012207031
2010	71.1900024414062
2011	72.129997253418
2012	72.0899963378906
2013	74.7399978637695
2014	75.4300003051758
2015	77.3300018310547
2016	75.4400024414062
2017	76.4300003051758
2018	76.6100006103516
2019	77.4000015258789
2020	78.7600021362305
2021	79.5500030517578
2022	80.4300003051758