Year	% of GDP
1991	5.647056602705075
1992	4.2779256096608815
1993	3.83194386528082
1994	3.0908646960972326
1995	4.036980053197912
1996	3.2949448878753325
1997	0.9824970828471412
1998	1.3449575212393803
1999	1.36945542380325
2010	26.93459978960811
2011	21.01765752780424
2012	12.506944737419106
2013	11.46794296927111