Year	2017 PPP (%)
1981	18.3
1982	17.8
1983	17.3
1984	16.8
1985	16.2
1986	15.9
1987	15.7
1988	15.2
1989	15.1
1990	14.9
1991	14.5
1992	13.9
1993	13.6
1994	13.1
1995	12.9
1996	12.3
2002	11
2003	10.5
2004	9.7
2005	9
2006	8.4
2007	7.7
2008	7.3
2009	6.8
2010	5.9
2011	5.1
2012	4.7
2013	4.5
2014	4.3
2015	4.1
2016	4
2017	3.5
2018	3.1
2019	3.3
2020	3.8
2021	3.5
2022	3.2