Year	2017 PPP (%)
1984	30.3
1987	28.5
1990	20.5
1993	20.2
1996	15.1
1998	24.6
1999	11.8
2000	10.7
2001	9.2
2002	5.3
2003	5.4
2004	6.3
2005	5.3
2006	7.5
2007	5.7
2008	5.3
2009	4.3
2010	3.5
2011	2.9
2012	2.3
2013	1.8
2014	1.5
2015	1.4
2016	1.2
2017	1
2018	0.8
2019	0.6
2020	0.5
2021	0.5
2022	0.3
2023	0.2