Year	2017 PPP (% of population)
1997	75.6
1998	83.9
1999	88.4
2000	90.8
2001	85.8
2002	76.9
2003	69.6
2004	70.2
2005	75.3
2006	41.9
2007	32.5
2008	34
2009	33
2010	30.1
2011	27
2012	25.9
2013	21.1
2014	19.9
2015	17.7
2016	17.7
2017	17.5
2018	14.6
2019	14.7
2021	14.4