Year	$ 2017 PPP (%)
1996	0.01
1997	0
1998	0.03
1999	0
2000	0.03
2001	0.02
2002	0
2003	0
2004	0
2005	0.01
2006	0
2008	0
2009	0.01
2011	0.01
2012	0
2013	0
2014	0.01
2015	0.03
2016	0.06
2017	0
2018	0
2019	0
2020	0
2021	0