Year	2017 PPP (%)
1995	67.8
1996	67.2
1997	66.6
1998	66
1999	65.9
2000	65.7
2001	65.1
2002	65.3
2003	64.8
2004	62.8
2005	61.8
2006	61.2
2007	60.5
2008	59.4
2009	59.6
2010	58.5
2011	58.1
2012	57.8
2013	57.8
2014	57.6
2015	58.3
2016	58.3
2017	58