Year	% of GDP
1974	9.915553825077662
1975	10.925545452104869
1976	11.414736436299801
1977	11.183696562360424
1978	11.753431816431254
1979	11.945648409777169
1980	11.49672912458297
1981	11.80805852951912
1982	12.023701730130538
1983	11.765133792851511
1984	12.217939766835832
1985	12.984413762108897
1986	13.627142529207864
1987	13.079881632634432
1988	13.475542358812751
1989	14.200852101440098
1990	12.708919389911765
1991	13.128351854216488
1992	13.053361941557032
1993	11.756769163511963
1994	12.144250859830098
1995	12.467049219259154
1996	12.48976332336802
1997	12.577798968528459
1998	11.747152451285142
1999	12.332735891255222
2000	11.823583485187914
2001	11.042589473067526
2002	11.546098345997397
2003	11.719120754869111
2004	11.907742728086705
2005	12.181688161970799
2006	13.010080559568303
2007	13.970792961001997
2008	12.548875402850806
2009	11.415678506489332
2010	12.896852295316275
2011	11.48192321431104
2012	12.452595583883488
2013	12.459196266272315
2014	11.524168455401393
2015	12.267498210012066
2016	12.597919769998176
2017	12.456957609669113
2018	12.921719823394703