Year 2017 PPP (%) 1987 5.2 1990 3.6 1992 2 1994 2.4 1996 1.6 1998 1.7 2000 2.2 2003 2.1 2006 0.7 2009 0.6 2011 0.3 2013 0.2 2015 0.2 2017 0.2 2020 0.9 2022 0.3