Year 2017 PPP (%) 1987 30.6 1990 25.7 1992 21.1 1994 19.8 1996 16.4 1998 15.3 2000 16.6 2003 16 2006 9.5 2009 7.5 2011 5.9 2013 3.3 2015 2.5 2017 1.9 2020 3.4 2022 1.3