Year	2017 PPP (% of population)
1993	84.8
1994	85.7
1995	85.6
1996	86.2
1997	85.6
1998	84.8
1999	86.5
2001	84.2
2002	84.6
2003	85.6
2004	83
2005	81.4
2006	80.4
2007	80.1
2008	79.1
2009	79.2
2010	78.6
2011	78.3
2012	78.3
2013	78.2
2014	78.1
2015	80.2
2016	80.2
2017	79.9
2018	79.7