Year	2017 PPP (% of population)
1995	81.6
1996	81.1
1997	80.5
1998	80.1
1999	80.4
2000	80.1
2001	79.4
2002	79.7
2003	79.4
2004	77.1
2005	75.8
2006	75.2
2007	74.6
2008	73.5
2009	73.7
2010	72.5
2011	72.2
2012	72
2013	71.9
2014	71.6
2015	72.6
2016	72.4
2017	71.6