Year	$ 2011 PPP (USD)
1998	0.0006085
1999	0.0012984
2000	0.0016597
2001	0.0008408
2002	0.0010628
2003	0.0007912
2004	0.0004655
2005	0.000364
2006	0.0003104
2007	0
2008	0
2009	0
2010	0
2011	0
2012	0