Year Percent of GDP 1990 28.264 1991 34.265 1992 34.162 1993 29.407 1994 30.26 1995 29.757 1996 27.694 1997 28.973 1998 28.827 1999 28.027 2000 27.367 2001 27.989 2002 28.474 2003 32.64 2004 31.329 2005 28.176 2006 26.334 2007 25.704 2008 22.929 2009 26.742 2010 28.638