Year	2011 PPP (%)
1987	23.7
1990	19.2
1992	14.9
1994	14.1
1996	11.3
1998	10.6
2000	11.5
2003	11.1
2006	7.7
2009	6.9
2011	5.2
2013	3
2015	3.3
2017	2