Year	World Bank (% of population)
2008	4.3
2009	4
2010	4.1
2011	4.7
2012	4.3
2013	4.4
2014	3.8
2015	3.2
2016	3
2017	2.9
2018	2.6
2019	1.7
2020	1.8
2021	1.6