Year 2017 PPP (% of population) 1977 0.2 1978 0.5 1979 0.5 1980 0.2 1981 0 1982 0 1983 0.2 1984 0 1986 0.2 1987 1 1989 0 1991 0.2 1993 1.2 1995 0.7 1998 1.7 2000 1.2 2002 1.5 2003 0.8 2004 0.6 2005 0.6 2006 0.7 2007 0.7 2008 0.7 2009 0.9 2010 1.3 2011 1.2 2012 1.2 2013 1.4 2014 1.2 2015 1.9 2016 1.6 2017 1.4 2018 1.5 2019 1 2020 0.8 2021 0.8