Year	2017 PPP (%)
1989	22.9
1992	20.4
1994	20.6
1996	28.8
1998	27.5
2000	22.5
2002	19.8
2004	17.9
2005	17.8
2006	15.5
2008	16.4
2010	15.2
2012	14.2
2014	14.6
2016	10.6
2018	9.4
2020	10
2022	6.5