Year	2017 PPP (%)
1987	29.8
1994	32.4
1995	30.9
1998	32.3
1999	36
2000	42.7
2003	28.1
2004	28.9
2005	23.5
2006	19.7
2007	19.3
2008	18.1
2009	17.8
2010	15.4
2011	13.2
2012	12.2
2013	11.2
2014	9.8
2015	10.5
2016	10.3
2017	9.7
2018	10.3
2019	10.9
2020	14.3
2021	11.5
2022	10.8