Year	2017 PPP (% of population)
1981	82.5
1982	80.7
1983	78.2
1984	74
1985	70.5
1986	67.7
1987	64
1988	58.7
1989	66.9
1990	65.4
1991	63.5
1992	60.7
1993	57.9
1994	53.1
1995	49.4
1996	45
1997	44.6
1998	45.5
1999	42.2
2000	39.5
2001	36.7
2002	32.7
2003	28.7
2004	25.1
2005	21.2
2006	20.5
2007	18.4
2008	17.4
2009	15.3
2010	13.2
2011	10.3
2012	8.8
2013	4.5
2014	3.6
2015	2.7
2016	2.3
2017	2
2018	1.6
2019	1.2
2020	1.3
2021	1.2
2022	1