Year	% (cumulative)
1971	0.348560005426407
1981	1.39004004001617
2001	12.0992298126221
2008	17.894495010376
2011	17.2314491271973
2016	19.215030670166
2017	26.6225490570068
2019	24.7163696289062
2021	26.5851192474365