Year	% (cumulative)
1970	8.80016994476318
1975	11.2474899291992
1980	15.0720100402832
1990	18.9949703216553
2000	16.2483100891113
2004	28.9751796722412
2008	30.981330871582
2010	32.1037406921387
2013	34.2601203918457
2017	23.1516494750977
2019	33.1401481628418
2020	37.2584609985352
2021	29.3138484954834
2022	28.893030166626