Year	World Bank (% of population)
2008	3.7
2009	3.6
2010	3.8
2011	4.6
2012	4.6
2013	3.7
2014	4.3
2015	4.1
2016	3.8
2017	2.9
2018	2.4
2019	3
2020	3.6
2021	2.7