Year	% of population
2000	3
2001	2.8
2002	2.6
2003	2.5
2004	2.3
2005	2.3
2006	2.2
2007	2.3
2008	2.4
2009	2.5
2010	2.6
2011	2.85
2012	3.1
2013	3.4
2014	3.8
2015	4.2
2016	4.7
2017	5.2
2018	6
2019	6.7
2020	7.5
2021	8.4
2022	9.5