Year	2017 PPP (%)
1991	0
1992	0.1
1993	0
1994	0.2
1995	0.2
1996	0
1997	0.1
1998	0
1999	0.1
2000	0
2001	0
2002	0
2003	0.1
2004	0
2005	0
2006	0
2007	0
2008	0.1
2009	0
2010	0
2011	0
2012	0
2013	0
2014	0
2015	0
2016	0
2017	0.3
2018	0
2019	0