Year	2017 PPP (% of population)
1990	1.2
1995	12.4
1997	10.6
1999	10.2
2001	8.9
2002	13.2
2003	8.3
2004	5.7
2005	6.1
2006	7.9
2007	7.8
2008	4.3
2009	5.8
2010	5.5
2011	5
2012	3.3
2013	1.8
2014	2.4
2015	1.9
2016	1.7
2017	1
2018	1.4
2019	1
2020	0.8
2021	0.7
2022	1.3