Year	% (cumulative)
1971	8.29526996612549
1980	14.3759803771973
1990	24.5488204956055
2006	46.9608688354492
2007	46.0391998291016
2008	46.8176002502441
2009	47.5304908752441
2011	49.2093315124512
2012	50.263973236084
2013	51.2917022705078
2014	51.7385101318359
2015	53.2102508544922
2016	47.7824401855469
2017	53.9116516113281
2018	55.0540504455566
2019	57.8881530761719
2020	58.2127990722656
2021	60.4325675964355
2022	59.6842193603516