Year	$ 2011 PPP (USD)
2001	0.0263132
2002	0.0228908
2004	0.022794
2005	0.0199549
2006	0.0189949
2007	0.0224797
2009	0.0170689
2010	0.0144619
2011	0.0123384
2012	0.0106116
2013	0.0114292
2014	0.0127728
2015	0.0039416