Year	% of population
2000	0
2001	0.1
2002	0.1
2003	0.2
2004	0.2
2005	0.2
2006	0.3
2007	0.3
2008	0.3
2009	0.4
2010	0.4
2011	0.4
2012	0.5
2013	0.5
2014	0.5
2015	0.6
2016	0.6
2017	0.7
2018	0.7
2019	0.7
2020	0.8
2021	0.8
2022	1