Year	% of GDP
1991	3.876596572008307
1992	4.505654043736579
1999	3.8819785604014854
2000	3.3807278387602273
2001	3.356085355944269
2002	3.0961309090641485
2003	3.0624658171031296
2004	2.670663114986113
2005	2.6776676875332686
2006	3.037461055677157
2007	3.0002151323270123
2008	4.122859458828098
2009	4.763003985068523
2010	4.421579006454897
2011	4.496956394087706
2012	3.29783168965938
2013	4.352759975125927
2014	6.420596548356718
2015	6.208668580735868
2016	4.0229663444921755