Year	% of GDP
1990	4.042300629242979
1991	3.009742750092142
1992	3.480633548167685
1993	3.1394937336964466
1994	3.0710206934280704
1995	2.175265630323203
1996	2.035457048463849
1997	2.173514779329491
1998	2.511562834347074
1999	2.7237036830832637
2000	2.048332428506449
2001	2.737737218707871
2002	4.585324743011123
2003	3.5301491548054456
2004	2.083139513718384
2005	3.975236700265146
2006	6.160145678440999
2007	5.558424964016802
2008	5.997641533830542
2009	4.417740994832326
2010	7.814802977599737
2011	4.374476427449168
2013	4.317015996939887