Year	2017 PPP (%)
1998	46.8
1999	43.6
2000	38.9
2001	28.9
2002	24.6
2003	22.4
2004	16
2005	10.2
2006	7.2
2007	5
2008	3.8
2009	3.5
2010	2.5
2011	2
2012	1
2013	0.6
2014	0.5
2015	0.7
2016	0.8
2017	0.6
2018	0.4
2019	0.3
2020	0.2