Year	% (cumulative)
1970	8.45343971252441
1981	14.0274295806885
1991	22.4267292022705
1998	23.6402893066406
1999	24.2998790740967
2000	25.2603092193604
2001	26.3282699584961
2002	27.2185001373291
2003	29.2138500213623
2004	31.8991203308105
2005	33.4472198486328
2006	34.9942398071289
2007	35.5457801818848
2008	37.5461883544922
2009	39.6641807556152
2010	41.3025512695312
2011	45.0074005126953
2012	47.2301597595215
2013	49.2851486206055
2014	51.444938659668
2015	52.7052001953125
2016	54.1912498474121
2017	55.180721282959
2018	54.3030204772949
2019	57.9531211853027
2020	60.7458801269531
2021	64.1804122924805
2022	64.6143264770508