Year	Percent of GDP
1980-01-01	42.519
1981-01-01	44.769
1982-01-01	43.050
1983-01-01	41.845
1984-01-01	42.250
1985-01-01	41.315
1986-01-01	41.294
1987-01-01	39.383
1988-01-01	37.127
1989-01-01	32.599
1990-01-01	28.623
1991-01-01	28.568
1992-01-01	33.360
1993-01-01	38.131
1994-01-01	40.945
1995-01-01	43.926
1996-01-01	44.032
1997-01-01	43.400
1998-01-01	41.183
1999-01-01	39.832
2000-01-01	37.007
2001-01-01	34.319
2002-01-01	34.404
2003-01-01	35.589
2004-01-01	38.594
2005-01-01	39.790
2006-01-01	40.710
2007-01-01	41.744
2008-01-01	49.688
2009-01-01	63.739
2010-01-01	75.236
2011-01-01	80.799
2012-01-01	84.088
2013-01-01	85.150
2014-01-01	87.014
2015-01-01	87.876
2016-01-01	87.909
2017-01-01	87.525