Year	% (cumulative)
1971	10
2001	37.5185394287109
2002	38.4239730834961
2003	40.6550827026367
2004	35.6909294128418
2005	36.0757484436035
2006	38.5362205505371
2007	39.5269584655762
2008	42.8230094909668
2009	43.8334503173828
2010	45.1392593383789
2011	46.570240020752
2012	50.0701904296875
2013	45.7568206787109
2014	47.4133186340332
2015	49.3194885253906
2016	50.0615692138672
2017	51.8496398925781
2018	53.0037498474121
2019	53.6000900268555
2020	56.1227684020996
2021	56.4584197998047
2022	58.4357795715332