Year	2017 PPP (%)
1981	21.2
1986	12.2
1989	9.9
1990	9.5
1991	11.2
1992	9.2
1993	8
1994	6.5
1995	6.9
1996	7.9
1997	6.1
1998	4.9
1999	6.1
2000	6.3
2001	4.7
2002	4.3
2003	4.3
2004	4
2005	3
2006	3.1
2007	1.9
2008	2.1
2009	2.3
2010	1.5
2011	1.6
2012	1.6
2013	1.5
2014	1.5
2015	1.5
2016	1.4
2017	1
2018	1.4
2019	1.1
2020	2.2
2021	1.2
2022	1