Year Percent of GDP 1998-01-01 16.5977127297969 1999-01-01 15.6504563440184 2000-01-01 19.9058563854302 2001-01-01 20.2823093120370 2002-01-01 21.5373562453635 2003-01-01 22.0938338603949 2004-01-01 24.0603352540907 2005-01-01 23.3309654693220 2006-01-01 25.3359798970480 2007-01-01 25.1355885866416 2008-01-01 26.0418843242133 2009-01-01 21.7538774709582 2010-01-01 23.8695786352052 2011-01-01 28.9300808490124 2012-01-01 27.2018202423353 2013-01-01 26.4085092909389 2014-01-01 25.9251065262676 2015-01-01 24.0201019966278 2016-01-01 22.9711360195248 2017-01-01 27.3924005001543