Year	2017 PPP (%)
1990	28.3
1993	24.1
1996	15.9
1999	15.9
2002	12.4
2005	6.2
2008	5.1
2010	3.6
2011	2.5
2012	2
2013	0.5
2014	0.4
2015	0.2
2016	0.2
2017	0.1
2018	0.1
2019	0
2020	0