Year	% (cumulative)
1970	29.2600002288818
1976	13.1999998092651
1980	15.9347896575928
2001	66.8600006103516
2002	68.1900024414062
2003	69.2300033569336
2004	70.0500030517578
2005	70.9499969482422
2006	72.6600036621094
2007	73.5400009155273
2008	74.5199966430664
2009	75.379997253418
2011	75.9000015258789
2012	78.3300018310547
2013	78.5800018310547
2014	79.1999969482422
2015	79.8899993896484
2016	82.1500015258789
2017	83.1900024414062
2018	84.2300033569336
2019	84.75
2020	86.2699966430664
2021	86.5699996948242
2022	86.4300003051758