Year Percent of GDP 1995-01-01 28.0342180249715 1996-01-01 29.2091425084216 1997-01-01 30.1546034568046 1998-01-01 30.6901180296434 1999-01-01 31.1631741493964 2000-01-01 33.7856589308948 2001-01-01 32.4492453978845 2002-01-01 29.7256243843235 2003-01-01 28.5993348014766 2004-01-01 28.6998735170709 2005-01-01 32.4208731916226 2006-01-01 34.0019660963612 2007-01-01 34.1102064596852 2008-01-01 35.8194182120566 2009-01-01 29.2460784397354 2010-01-01 32.4659962194608 2011-01-01 33.8859380718144 2012-01-01 33.3650098111538 2013-01-01 33.5544826135662 2014-01-01 34.1815142196801 2015-01-01 33.5273571114686 2016-01-01 32.9187969610154 2017-01-01 35.7964258257789