Year	2017 PPP (%)
1980	0.2
1985	0
1990	0.3
1993	0.8
1994	0.7
1995	0.7
1996	0.9
1997	0.6
1998	0.6
1999	0.4
2000	0.5
2003	0.6
2004	0.6
2005	0.6
2006	0.6
2007	0.3
2008	0.4
2009	0.6
2010	0.5
2011	0.9
2012	0.6
2013	0.7
2014	0.5
2015	0.6
2016	0.7
2017	0.5
2018	0.6
2019	0.6
2020	0.5
2021	0.4