Year	% of GDP
1960	17.66052453071429
1961	17.886843261357566
1962	17.48300940849167
1963	17.926408169245033
1964	19.01249906798931
1965	20.726230263121987
1966	21.605827216254863
1967	22.362354483289963
1968	21.037320599470142
1969	20.363057306246358
1970	19.53919235058682
1971	22.661610336557274
1972	25.7289663662798
1973	28.814340693585166
1974	27.837771060844986
1975	29.918431664527116
1976	32.90897034444817
1977	32.75414613124914
1978	31.457838008291112
1979	20.286355354004602
1980	23.537289318522134
1981	27.33299327052121
1982	28.442802199735436
1983	36.913055324331786
1984	34.29953891827774
1985	23.473929576849724
1986	21.550772735180082
1987	25.519259900624906
1988	25.387985643393375
1989	19.033814480567937
1990	20.11747829449683
1991	11.582966894373554
1992	12.691600203257721
1993	13.77306914750992
1994	10.52201787398939
1995	12.33928972335631
1996	13.320502042682477
1997	19.817565604725477
1998	25.08106479032635
1999	28.568283105399182
2000	26.768837401568803
2001	25.30683284688665
2002	23.504837109216467
2003	20.4593307649251
2004	17.028436540572443
2005	17.59970887704888
2006	15.171047045072674
2007	16.877734196867966
2008	19.833908758936463
2009	19.808259284188292
2010	18.86886517281479
2011	19.06273898793677