Year	World Bank (% of population)
2008	2.8
2009	2.5
2010	2.6
2011	2
2012	1.9
2013	1.9
2014	1.6
2015	1.6
2016	1.5
2017	1.4
2018	1.3
2019	1.2
2020	1.1
2021	0.9