Year	% of GDP
1972	0.275191343981362
1973	0.2280100127966235
1974	0.18443701087790076
1975	0.23680874399965812
1976	0.27596705903453167
1977	0.2867674820085828
1978	0.33424065922804014
1979	0.3425526950713899
1980	0.3300310397167683
1981	0.4337331515250351
1982	0.4025373610595645
1983	0.3802932165266296
1984	0.3670485507154846
1985	0.3433987580949343
1986	0.3126889480833718
1987	0.33345588197433074
1988	0.3332417952814489
1989	0.30913325699538075
1990	0.36052859052359315
1991	0.3645090782986911
1992	0.3778938523694169
1993	0.37433931679680216
1994	0.3605654099318968
1995	0.2693863781738501
1996	0.3432984121193357
1997	0.28480389405994916
1998	0.3264090153699962
1999	0.40440238576588067
2000	0.42611780893409257
2001	1.395283812577448
2002	1.506824782759158
2003	1.5572775966884913
2004	1.5669734147165422
2005	1.5395897385752833
2006	1.4734768702890122
2007	1.5616313027369038
2008	1.5578104323229884
2009	1.7438537525751536
2010	1.814382111020925
2011	1.7131006006312022
2012	1.5858856567131003
2013	1.4316233893347146
2014	1.3144771748035102
2015	1.1467135636005807
2016	1.2509533609500614