Year	% of GDP
1972	1.4760147601476015
1973	1.3268887383781787
1974	1.3552424208167364
1975	1.3232547178045844
1976	1.3542797995094815
1977	1.4314289851924262
1978	1.4195098549738199
1979	1.169225508888121
1980	1.2347657244116013
1981	1.1791360855640758
1982	1.1114820997959562
1983	1.1517667911319074
1984	1.1275731214683131
1985	1.228658504059374
1986	1.2849021845227457
1987	1.4194942618535331
1988	1.5966353654055812
1989	1.8168707206520696
1990	1.740189181728347
1991	1.9053597894915368
1992	1.984766810192684
1993	1.640400233340854
1994	1.5157560613524557
1995	2.40256328791928
1996	2.3112398925921993
1997	2.2443794136716493
1998	2.492345423968555
1999	2.2333064605914266
2000	1.7099895834161625
2001	1.542533771449434
2002	2.1003807191788484
2003	2.1330648761310145
2004	2.118422502255158
2005	2.015586090793511
2006	2.07962618956335
2007	2.177678425404229
2008	2.2265825367496337
2009	2.6294497055390145
2010	2.1678844808242728
2011	2.2015502882813056
2012	2.1325260250975333
2013	2.351686791237843
2014	2.6446528786352985
2015	2.81219979790319
2016	2.984241191129111