Year	2017 PPP (%)
1981	11.3
1986	6
1989	5.9
1990	5.5
1991	6
1992	5
1993	4.7
1994	3.7
1995	3.9
1996	4.4
1997	3.2
1998	2.5
1999	3.1
2000	3.3
2001	2.3
2002	2.2
2003	2.1
2004	1.8
2005	1.2
2006	1.3
2007	0.7
2008	1
2009	1.1
2010	0.7
2011	0.7
2012	0.6
2013	0.6
2014	0.6
2015	0.6
2016	0.5
2017	0.4
2018	0.6
2019	0.4
2020	0.9
2021	0.4
2022	0.3