Year	2017 PPP (%)
1979	0.2
1986	0.3
1992	0.1
1997	0.4
2001	0.2
2002	0.6
2003	0.6
2004	0.6
2005	0.6
2006	0.3
2007	0.4
2008	0.5
2009	0.5
2010	0.4
2011	0.3
2012	0.5
2013	0.4
2014	0.4
2015	0.4
2016	0.3
2017	0.4
2018	0.4
2019	0.6
2020	0.5
2021	0.4