Year	% (cumulative)
1976	12.0882596969604
1992	28.0149402618408
2000	29.7099990844727
2001	28.3199996948242
2002	25.7000007629395
2004	26.0400009155273
2005	30.9599990844727
2006	33.4700012207031
2007	36.6100006103516
2008	36.310001373291
2009	38.060001373291
2011	40.4500007629395
2012	41.9599990844727
2013	46.4099998474121
2014	40.8699989318848
2015	42.1699981689453
2016	43.1500015258789
2017	44.7200012207031
2018	45.189998626709
2019	48.5800018310547
2020	50.4799995422363
2021	49.7099990844727
2022	50.7063941955566