Year	$ 2011 PPP (%)
1997	1.32325
1998	1.090827
1999	1.813958
2000	2.11434
2001	2.756569
2002	2.121147
2003	2.168618
2004	1.996669
2005	2.185907
2006	2.485083
2007	2.843746
2008	3.055799
2009	3.502986
2010	3.313185
2011	3.258145
2012	3.745295
2013	3.06955