Year	% of GDP
1972	2.3474472196417944
1973	2.564383702158011
1974	3.402609956500725
1975	4.599644128113879
1976	4.209940808974066
2003	2.9490021551935404
2004	2.757890500441156
2005	2.7795223224927263
2006	1.8034980221825796
2007	2.2871362074811876
2008	2.9871551717896216
2009	3.0922366835224624
2010	2.1538261061325956
2011	2.028762149887263
2012	1.872319079780323
2013	2.9409252561617722
2014	2.290876239499001
2015	2.1135598285017916