Year	% of population
2007	0.8
2008	1.3
2009	3
2010	1.5
2011	2.8
2012	3.3
2013	3.8
2014	4.3
2015	4.8
2016	5.3
2017	4.2
2018	6.3
2019	6.8
2020	7.3
2021	7.7
2022	8.4