Year	2017 PPP (% of population)
1980	7.2
1985	7.2
1990	3
1993	4.5
1994	4.5
1995	4.7
1996	5.7
1997	4.5
1998	3
1999	2.5
2000	2.4
2003	2.2
2004	2.4
2005	2.6
2006	2.6
2007	1.6
2008	1.9
2009	2.3
2010	2.7
2011	3
2012	3.4
2013	3.8
2014	3.3
2015	3.5
2016	3.5
2017	2.5
2018	2.7
2019	2.8
2020	3.1
2021	1.9