Year	2017 PPP (%)
1990	12.1
1991	13.3
1992	15.4
1993	17.9
1994	20.6
1995	18.5
1996	20
1997	18.5
1998	18.9
1999	23.3
2000	21
2001	19.1
2002	17.3
2003	16.6
2004	14
2005	12.6
2006	10.5
2007	8.7
2008	6.9
2009	6.5
2010	6
2011	5.3
2012	5
2013	4.4
2014	4.5
2015	4.3
2016	3.9
2017	3.7
2018	3.1
2019	3
2020	3
2021	2.6
2022	2.5