Year	2017 PPP (% of population)
2000	75.7
2001	71.5
2002	69.7
2003	67.5
2004	44.2
2005	49.7
2006	37
2007	33.6
2008	22.7
2009	18.7
2010	21.4
2011	19.3
2012	20
2013	24.1
2014	17.6
2015	21.1
2016	17
2017	17.3
2018	13.2
2019	11.7
2020	18.7
2021	12.5