Year 2017 PPP (%) 1990 3.9 1991 4.3 1992 5.3 1993 6 1994 7.5 1995 7.2 1996 7.5 1997 7 1998 7.1 1999 9 2000 8.1 2001 7.3 2002 6.4 2003 6.3 2004 4.9 2005 4.3 2006 3.2 2007 2.3 2008 1.6 2009 1.4 2010 1.3 2011 1.1 2012 1 2013 0.9 2014 1.1 2015 0.9 2016 0.8 2017 0.8 2018 0.5 2019 0.5 2020 0.6 2021 0.5 2022 0.5