Year	% of GDP
1967	33.196977887350165
1969	35.670156442492036
1970	34.16276106955879
1971	35.549522855579646
1972	36.455980031818086
1973	34.06013934845221
1974	32.87347722666948
1975	35.716094715632906
1976	37.73702135635555
1977	37.300244612188564
1978	38.281606801817496
1979	36.88184833149733
1983	42.29042504390396
1984	41.24671428729273
1985	45.79871445007621
1986	47.34857397802337
1987	47.52397843084685
1988	49.45626537159864
1989	48.37394181821953
1990	45.19702866622739
1991	48.23843819422856
1992	49.55938314054596
1999	80.657511963319
2000	82.9165380010304
2001	59.39464450324152
2002	60.103324638326185
2003	61.19363980534875
2004	61.72183174144916
2005	62.35711482593351
2006	65.42303297198646
2012	68.21433852346905
2013	69.51994884575475
2014	71.5872839088455
2015	75.02416517082166