Year	% of GDP
1972	8.288601295317424
1973	8.566336530752794
1974	8.105885712684321
1975	11.681945180960833
1976	10.85353300457573
1977	15.198615474904715
1978	12.318413325191695
1979	7.133026408748071
1980	7.699164191360672
1981	7.814580214833472
1982	8.187748001457672
1983	7.955616950190933
1984	5.578817049539358
1985	4.3256441101204235
1986	4.037188438636724
1987	3.6041299635540454
1988	3.127767106222417
1989	3.0845861811403563
1990	4.519495299909122
1991	4.551417750182351
1992	4.540696970208313
1993	6.344861241685532
1994	6.847411126371422
1995	6.8323399721541795
1996	6.463846090763551
1997	6.008116868680884
1998	4.493027734326495
1999	5.796257585936251
2000	4.382549860281204
2001	3.5128441506733727
2002	5.866670259430695
2003	5.450237144475072
2004	4.510125164791919
2005	6.423144389133656
2006	6.58971966972717
2007	5.2150674125720275
2008	5.896486684378519
2009	5.287225463768822