Year	% (cumulative)
1981	32.0320587158203
2001	72.9678573608398
2008	72.5917892456055
2009	72.7323684692383
2010	57.7058067321777
2011	59.1490097045898
2013	62.2434883117676
2014	63.1219596862793
2015	64.1781692504883
2016	81.6521987915039
2017	82.2030410766602
2018	82.8419494628906
2019	80.1704177856445
2020	83.9634704589844
2021	80.6453475952148
2022	81.1216430664062