Year	% of GDP
1960	3.47254065134591
1961	5.24961139141255
1962	4.5306341015917
1963	4.41326642246175
1964	5.23351547011098
1965	5.68647000857403
1966	7.29814561954028
1967	9.28990955968501
1968	9.6779551989881
1969	10.4488608359681
1970	8.5546344736086
1971	7.0787518222316
1972	7.56412535185507
1973	9.23183405455819
1974	11.6670541783404
1975	13.0153122265632
1976	11.1446712210041
1977	13.6380014585107
1978	15.6029574224234
1979	23.1230262361504
1980	22.3026298608126
1981	18.2897824341308
1982	15.1780321422336
1983	13.6135769306431
1984	13.428500518078
1985	14.3172037247527
1986	22.0292189494085
1987	22.2129236960792
1988	16.1242701013217
1989	12.5015897918426
1990	11.465243558633
1991	12.0150256262882
1992	14.1205857295329
1993	14.635395234724
1994	12.0326402810525
1995	9.88252316679751
1996	11.0780115786397
1997	10.1466524040795
1998	9.10054778605064
1999	10.6965081481927
2000	12.3458544671395
2001	13.0489772384886
2002	11.4583378293415
2003	11.4528207010474
2004	7.90699469202603
2005	6.41158640156331
2006	4.35309038213383
2007	0.820723864143233
2008	-1.27039350194744
2009	7.18479124639487
2010	7.64601201368811
2011	6.09452226237707
2012	5.5046411129706
2013	7.27387426759362
2014	11.0474309333993
2015	17.6645659561322
2016	24.8270053475936
2017	25.2485686384911
2018	22.4805505470843