Year	% (cumulative)
1971	3.08225989341736
1976	3.79999995231628
1981	7.15563011169434
1986	7.69999980926514
1991	10.6254196166992
1996	14.4790802001953
2006	21.9204597473145
2008	22.5539093017578
2009	22.8436603546143
2010	22.9925899505615
2011	24.5232696533203
2014	26.9329109191895
2015	27.9346199035645
2017	29.1032390594482
2019	31.0677795410156
2022	32.4279594421387