Year	Percent of GDP
1970-01-01	15.8963447426664
1971-01-01	15.5324502536029
1972-01-01	15.6008064575245
1973-01-01	16.8488876642284
1974-01-01	20.1509073607482
1975-01-01	18.4765785999171
1976-01-01	19.5653294159950
1977-01-01	19.5923016097558
1978-01-01	19.1970538248300
1979-01-01	19.5815664197886
1980-01-01	20.3743576505346
1981-01-01	21.9837308419801
1982-01-01	22.7210329948470
1983-01-01	21.9458716090136
1984-01-01	23.7769180818332
1985-01-01	25.1401224018937
1986-01-01	23.3585452833822
1987-01-01	22.6873553125939
1988-01-01	23.0290734864322
1989-01-01	24.4591485746195
1990-01-01	23.3735340073073
1991-01-01	21.7197397862753
1992-01-01	20.1960357393361
1993-01-01	18.4315956617802
1994-01-01	19.3551051340040
1995-01-01	20.1694093942480
1996-01-01	20.9567406472264
1997-01-01	23.1288483551574
1998-01-01	24.1676537606026
1999-01-01	24.6135928410079
2000-01-01	28.2458465018471
2001-01-01	29.2519768284228
2002-01-01	29.4523113515368
2003-01-01	29.9067771972437
2004-01-01	32.1780501893220
2005-01-01	33.9039499612261
2006-01-01	36.8436576242277
2007-01-01	38.3286055315956
2008-01-01	38.3348547451911
2009-01-01	32.5787966950432
2010-01-01	36.6584742291456
2011-01-01	39.1083273716323
2012-01-01	39.5671291290431
2013-01-01	38.4786921394674
2014-01-01	38.2309449162954
2015-01-01	39.1367469266783
2016-01-01	38.1059584985681
2017-01-01	39.0215094107622