Year 2017 PPP (%) 1984 4.1 1987 3.8 1989 3.3 1992 3.3 1995 3.4 1997 1.9 2003 2 2006 1.1 2008 1.1 2011 0.3 2013 0.1 2015 0.1 2018 0 2021 0