Year	2017 PPP (%)
1990	51.5
1993	45.9
1996	36.2
1999	34.6
2002	28.2
2005	18.6
2008	14.9
2010	11.8
2011	9.3
2012	7.8
2013	3.9
2014	3
2015	2.1
2016	1.6
2017	1.4
2018	0.9
2019	0.5
2020	0.3