Year	% (cumulative)
1970	15.6603403091431
1980	27.6175193786621
1985	56.9637718200684
1990	48.4000015258789
1995	56.4612083435059
2000	63.714599609375
2003	67.0009460449219
2004	67.9920120239258
2005	69.2535018920898
2006	70.1374053955078
2007	71.1858749389648
2008	71.8423461914062
2009	66.0361862182617
2010	72.7248001098633
2011	73.3761596679688
2012	74.06982421875
2013	74.8261566162109
2014	75.9209594726562
2015	76.4498977661133
2016	77.3171768188477
2017	77.6303787231445
2018	77.9471054077148
2019	78.4517593383789
2020	78.8234252929688
2021	79.337776184082
2022	79.7711639404297