Year	% of population
2000	1.4
2001	1.6
2002	1.8
2003	2.1
2004	2.4
2005	2.8
2006	3.4
2007	3.9
2008	4.4
2009	5
2010	5.6
2011	6.2
2012	6.8
2013	7.5
2014	8.1
2015	8.8
2016	9.3
2017	10
2018	10.6
2019	11.3
2020	12.3
2021	13.2
2022	13.9