Year	% of population
2000	2.7
2001	2.9
2002	3.1
2003	3.4
2004	3.6
2005	3.9
2006	4.3
2007	4.6
2008	5
2009	5.4
2010	5.8
2011	6.2
2012	6.9
2013	7.5
2014	8.2
2015	8.9
2016	10
2017	10.8
2018	11.9
2019	13.1
2020	14.5
2021	15.8
2022	17.2