Year	% of population
2000	2
2001	2.2
2002	2.5
2003	2.9
2004	3.4
2005	3.9
2006	4.5
2007	5.4
2008	6.4
2009	7.6
2010	9.1
2011	10.9
2012	13.1
2013	15.3
2014	18
2015	20.9
2016	24.3
2017	27.9
2018	31.9
2019	36.1
2020	40.75
2021	45.9
2022	50.7