Year	2017 PPP (% of population)
1999	82.3
2001	83.8
2002	82.9
2003	82.6
2004	73.5
2005	67.5
2006	62.8
2007	56
2008	52.1
2009	60.7
2010	62.1
2011	59.3
2012	55.2
2013	53.1
2014	51.1
2015	46.7
2016	42.4
2017	48.7
2018	48.9
2019	52.1
2020	53.2
2021	51.7
2022	51.3