Year	2017 PPP (%)
1975	0.3
1981	0.2
1987	0.1
1992	0
1995	0.1
2000	0
2001	0.1
2002	0
2003	0.2
2004	0.3
2005	0.8
2006	0.3
2007	0.3
2008	0.5
2009	0.3
2010	0.4
2011	0.4
2012	0.4
2013	0.5
2014	0.3
2015	0.3
2016	0.2
2017	0.1
2018	0.6
2019	0.2
2020	0.3
2021	0.5