Year	% (cumulative)
1970	29.2200508117676
1981	11.5008001327515
1991	20.1437397003174
1998	71.0344085693359
1999	71.2858734130859
2000	72.7003173828125
2001	73.4950637817383
2002	74.9907684326172
2003	76.3929824829102
2004	78.4282913208008
2005	79.2815399169922
2006	80.4571990966797
2007	81.2696762084961
2008	82.0986785888672
2009	83.5911026000977
2010	84.4920272827148
2011	83.9115295410156
2012	84.7279815673828
2013	85.704963684082
2014	86.6627197265625
2015	87.4541397094727
2016	88.2298736572266
2017	88.9834289550781
2018	88.6368026733398
2019	90.2518692016602
2020	91.5823364257812
2021	94.123908996582
2022	94.1874694824219