Year	2017 PPP (%)
1996	20.2
1997	36.3
1998	35.5
1999	40.7
2000	42.5
2001	44
2002	32.8
2003	32.8
2004	30.9
2005	32.4
2006	32.8
2007	34.2
2008	31.4
2009	31.6
2010	32.6
2011	31.3
2012	28.3
2013	24.7
2014	22.3
2015	21.3
2016	20.9
2017	21
2018	20.5
2019	19.9
2020	22.3
2021	20.5