Year	Percent of GDP
1980-01-01	20.829
1981-01-01	22.040
1982-01-01	25.359
1983-01-01	26.687
1984-01-01	29.094
1985-01-01	30.699
1986-01-01	31.304
1987-01-01	33.681
1988-01-01	33.635
1989-01-01	34.439
1990-01-01	35.585
1991-01-01	36.475
1992-01-01	40.222
1993-01-01	46.554
1994-01-01	49.887
1995-01-01	56.104
1996-01-01	59.995
1997-01-01	61.426
1998-01-01	61.351
1999-01-01	60.500
2000-01-01	58.881
2001-01-01	58.341
2002-01-01	60.258
2003-01-01	64.415
2004-01-01	65.938
2005-01-01	67.382
2006-01-01	64.611
2007-01-01	64.537
2008-01-01	68.777
2009-01-01	83.035
2010-01-01	85.256
2011-01-01	87.832
2012-01-01	90.602
2013-01-01	93.412
2014-01-01	94.889
2015-01-01	95.582
2016-01-01	96.587
2017-01-01	96.801