Year	% of population
2000	0.9
2001	1.1
2002	1.2
2003	1.5
2004	1.7
2005	2
2006	2.3
2007	2.7
2008	3.2
2009	3.8
2010	4.5
2011	5.2
2012	6
2013	6.9
2014	8
2015	9
2016	10.2
2017	11.15
2018	12.4
2019	13.7
2020	14.9
2021	16.4
2022	17.7