Year	2017 PPP (%)
1980	32.2
1988	26.2
1989	26.5
1991	24.5
1992	24.2
1996	31.6
1999	34.7
2000	31.3
2001	35.8
2002	27.8
2003	27.1
2004	26.5
2005	24
2008	22.5
2009	21.2
2010	19.4
2011	17.5
2012	16.7
2013	15.6
2014	14.4
2015	13.7
2016	13.5
2017	13
2018	13.1
2019	14
2020	19
2021	16.5
2022	14.4