Year	% of GDP
1991	5.550869694962187
1995	4.405220583701184
1996	4.479935360102274
1997	4.460376801458279
1998	4.040638675933081
1999	4.317001373456137
2000	3.880936442158256
2001	4.011261511741695
2002	4.697026418691626
2003	4.670564268441386
2004	3.5979016335656935
2005	4.0684485227999625
2006	4.571247499079213
2007	4.372729749497397
2008	4.338026517789115
2009	3.799266943754821
2010	4.837191544825529
2011	4.357167359170077
2013	3.446023218035135