Year	% (cumulative)
1971	3.60847997665405
1981	6.49269008636475
1991	12.7313995361328
2006	43.7676887512207
2007	42.8974609375
2008	41.9570770263672
2009	44.5962066650391
2010	45.5285606384277
2011	38.2786407470703
2012	49.6862602233887
2013	51.2676734924316
2014	53.1632652282715
2015	53.6801834106445
2016	54.8494567871094
2017	43.8959083557129
2018	56.9522399902344
2019	57.2028121948242
2020	59.375244140625
2021	62.0939750671387
2022	62.438060760498