Year	% (cumulative)
1972	8.11332988739014
1982	11.2061004638672
1992	18.4295902252197
2001	20.6200008392334
2002	18.1399993896484
2003	22.4799995422363
2004	21.6599998474121
2005	25.4300003051758
2006	25.1399993896484
2007	27.2199993133545
2008	28.9899997711182
2009	30.3099994659424
2010	29.6100006103516
2011	33.2700004577637
2012	32.060001373291
2013	35.7799987792969
2014	36.8400001525879
2015	38.9700012207031
2016	36.2999992370605
2017	37.9000015258789
2018	39.4099998474121
2019	42.6800003051758
2020	42.5299987792969
2021	41.4000015258789
2022	44.1800003051758