Year	2017 PPP (%)
1987	30.6
1990	25.7
1992	21.1
1994	19.8
1996	16.4
1998	15.3
2000	16.6
2003	16
2006	9.5
2009	7.5
2011	5.9
2013	3.3
2015	2.5
2017	1.9
2020	3.4
2022	1.3