Year	Percent of GDP
1980-01-01	22.526
1981-01-01	26.681
1982-01-01	29.310
1983-01-01	33.591
1984-01-01	40.061
1985-01-01	46.621
1986-01-01	47.142
1987-01-01	52.413
1988-01-01	57.069
1989-01-01	59.821
1990-01-01	73.155
1991-01-01	74.683
1992-01-01	79.968
1993-01-01	100.288
1994-01-01	98.296
1995-01-01	98.990
1996-01-01	101.335
1997-01-01	99.452
1998-01-01	97.425
1999-01-01	98.906
2000-01-01	104.935
2001-01-01	107.081
2002-01-01	104.863
2003-01-01	101.456
2004-01-01	102.870
2005-01-01	107.392
2006-01-01	103.574
2007-01-01	103.103
2008-01-01	109.416
2009-01-01	126.745
2010-01-01	146.250
2011-01-01	180.564
2012-01-01	159.586
2013-01-01	177.946
2014-01-01	180.212
2015-01-01	178.779
2016-01-01	183.453
2017-01-01	181.779