Year	% of GDP
1960	4.462009178990311
1961	4.415218412400188
1962	4.367567567567567
1963	4.6971307120085015
1964	5.0062060405461315
1965	5.537911869789599
1966	7.409556974269685
1967	7.28961943898517
1968	7.223553577541936
1969	7.135084719415513
1970	6.796116504854369
1971	6.4131526104417675
1972	6.141568355308814
1973	5.842277181521232
1974	6.0355458832063835
1975	6.085506728593545
1976	5.750310440347693
1977	5.353860294117647
1978	5.693892184342611
1979	6.244291289545794
1980	6.794164302151523
1981	6.802109852077405
1982	6.58850408850409
1983	7.030432181845371
1984	7.74265750741796
1985	8.090037408092188
1986	8.215057172866175
1987	8.456174200661522
1988	8.25647646363053
1989	8.304225293632216
1990	8.3363334004908
1991	6.242697053433972
1992	5.701082855445585
1993	5.299432420751469
1994	5.184338186937967
1995	4.627631795207457
1996	8.865233765930737
1997	8.44533492788329
1998	8.506433274149874
1999	8.340737866521705
2000	8.301581589244972
2001	6.445799430466767
2002	6.417677519846622
2003	5.917529662080723
2004	5.556734195621931
2005	5.057505194404661
2006	4.527741364611534
2007	4.496305856137115
2008	4.505747819798407
2009	5.134511309388129