Year	% of GDP
1995	4.887663539030886
1996	3.8132112489868675
1997	3.80285762576813
1998	5.619572402610901
2002	6.635601660294778
2003	4.635094977705249
2004	5.180870215927207
2011	5.109592780080946
2012	4.395389893990971
2013	3.912927122120391
2014	4.0341509562425415
2015	4.109378954435836
2016	3.877773469095315