Year	% of population
2000	0.3
2001	0.4
2002	0.5
2003	0.7
2004	0.9
2005	1.1
2006	1.5
2007	1.8
2008	2.3
2009	2.8
2010	3.3
2011	3.9
2012	4.5
2013	5.3
2014	6
2015	6.7
2016	7.6
2017	8.1
2018	9
2019	9.6
2020	10.4
2021	11
2022	11.9