Year	2017 PPP (%)
1987	13.4
1990	10.1
1992	6.9
1994	6.8
1996	5.2
1998	4.9
2000	5.6
2003	5.3
2006	2.2
2009	1.7
2011	1.1
2013	0.6
2015	0.5
2017	0.4
2020	1.3
2022	0.4