Year	% (cumulative)
1971	34.1842002868652
1981	49.7032089233398
1991	63.1953086853027
2006	85.4807815551758
2007	81.7177124023438
2008	79.5202178955078
2009	80.3371658325195
2010	81.5875930786133
2011	84.5404663085938
2012	83.0879211425781
2013	84.3698806762695
2014	86.7468795776367
2015	87.0439453125
2016	87.3368911743164
2017	87.2185592651367
2018	88.0960845947266
2019	88.3245086669922
2020	89.1274185180664
2021	90.1366958618164
2022	90.3994903564453