Year	Percent of GDP
1997-01-01	24.948
1998-01-01	23.649
1999-01-01	23.663
2000-01-01	26.170
2001-01-01	30.011
2002-01-01	29.639
2003-01-01	32.027
2004-01-01	33.292
2005-01-01	33.911
2006-01-01	33.117
2007-01-01	32.053
2008-01-01	33.262
2009-01-01	36.591
2010-01-01	36.736
2011-01-01	38.211
2012-01-01	39.182
2013-01-01	38.999
2014-01-01	37.830
2015-01-01	36.553
2016-01-01	36.232
2017-01-01	35.653