Year	2017 PPP (%)
1989	63.1
1990	63.3
1991	63
1992	62.4
1993	62.6
1994	62.1
1995	61.8
1996	61
1997	60.6
1998	60.4
1999	60.6
2000	60.5
2001	60.2
2002	59.8
2003	58.9
2004	57
2005	55.8
2006	54.7
2007	53.4
2008	52.1
2009	51.4
2010	50.5
2011	49.6
2012	48.9
2013	48.2
2014	47.5
2015	47.2
2016	46.8
2017	46.1
2018	45.5
2019	45.3