Year	2017 PPP (%)
1996	28
2001	33.8
2002	31
2003	27.2
2004	23.6
2005	26.3
2006	14.2
2007	9.5
2008	8.5
2009	8.9
2010	7
2011	3.6
2012	3.5
2013	2.3
2014	2.5
2015	3
2016	4.6
2017	3.3
2018	2.4
2019	2.4
2020	2.2
2021	1.6