Year	2017 PPP (% of population)
1981	93.7
1982	93.7
1983	93.7
1984	93.6
1985	93.4
1986	93.2
1987	93.2
1988	92.9
1989	92.9
1990	92.8
1991	92.8
1992	92.8
1993	93
1994	92.7
1995	92.5
1996	92
2002	91.2
2003	90.9
2004	90.3
2005	89.9
2006	89.3
2007	88.7
2008	88.2
2009	87
2010	85.6
2011	84.3
2012	83.4
2013	82.5
2014	81.7
2015	80.9
2016	80.5
2017	79
2018	77.3
2019	75.8
2020	77.2
2021	76.5
2022	75