Year	2017 PPP (%)
1981	13.2
1982	13.6
1983	15.7
1984	15.4
1985	14.4
1986	10.8
1987	12.9
1988	13.4
1989	13
1990	13.8
1991	13.5
1992	13.4
1993	13.4
1994	12.5
1995	12.2
1996	13.2
1997	12.9
1998	12.7
1999	12.9
2000	12
2001	11.7
2002	11
2003	10.7
2004	9.9
2005	9.3
2006	7.8
2007	6.9
2008	6.4
2009	6.1
2010	5.4
2011	5
2012	4.7
2013	4.3
2014	4
2015	3.8
2016	3.9
2017	3.9
2018	3.8
2019	3.8
2020	3.6
2021	4
2022	3.2