Year	% (cumulative)
1971	4.81909990310669
1976	5.54829978942871
1981	9.11067962646484
1986	9.51786994934082
1991	12.8910398483276
1996	16.852840423584
2006	24.414119720459
2008	25.1796703338623
2009	25.8374004364014
2010	25.9037399291992
2011	27.7414798736572
2014	30.363000869751
2015	31.7908706665039
2017	32.7792015075684
2019	34.6600112915039
2022	35.6884384155273