Year	% of GDP
1997	1.7402911913574666
1998	0.9137645411323114
2008	2.3241377084111803
2009	2.2383854855939105
2010	2.117838192151059
2011	2.1249432368696093
2012	2.2337957499758248
2013	2.031659051330899
2014	2.0312842714480666
2015	2.27562529001449
2016	3.2831575901372556