Year	% (cumulative)
1971	10.2108001708984
1976	13.8000001907349
1981	19.4317607879639
1991	33.3325309753418
1996	41.3811798095703
2006	52.2823905944824
2008	53.4722518920898
2009	54.1967391967773
2010	55.3944511413574
2011	57.3570098876953
2014	59.6217002868652
2015	60.5035781860352
2017	61.5969505310059
2019	62.281078338623
2022	63.4670295715332