Year	2017 PPP (% of population)
1989	93.3
1990	93.4
1991	93.4
1992	93.3
1993	93.6
1994	93.3
1995	93.1
1996	92.7
1997	92.4
1998	92.2
1999	92.5
2000	92.5
2001	92.5
2002	92.5
2003	92.4
2004	91.5
2005	91
2006	90.5
2007	89.9
2008	89.1
2009	88.7
2010	88.1
2011	87.5
2012	87.1
2013	86.6
2014	85.9
2015	85.5
2016	85
2017	84.4
2018	83.8
2019	83.6