Year 2011 PPP (%) 1986 1.7 1989 3.4 1992 1.5 1996 1.9 1997 2 2000 1.8 2001 1.1 2002 1.9 2003 2.2 2004 2.7 2005 1.7 2006 1.2 2007 1.2 2008 1 2009 0.8 2010 0.6 2011 0.7 2012 0.7 2013 0.5 2014 0.5 2015 0.5 2016 0.5