Year	% of GDP
1960	12.7281999572833
1961	16.1037442857233
1962	17.8184833611756
1963	19.6720786116977
1964	21.1909850002808
1965	29.2814841572076
1966	29.4547698105163
1967	30.9984818594058
1968	27.7313615874672
1969	29.7483224549392
1970	29.487391484764
1971	27.2390631753851
1972	25.787730195622
1973	22.7015343577175
1974	5.81766653828196
1975	2.88959946896226
1976	1.43931798245176
1977	4.72183186125581
1978	14.6824774924901
1979	16.0525638157694
1980	10.8999538139384
1981	3.15136468113522
1982	7.51019055997748
1983	15.1307048903414
1984	22.8309200203589
1985	29.8694299508406
1986	45.7153184203296
1987	51.0447923978785
1988	52.388335411451
1989	50.7918903070875
1990	47.3496894585998
1991	45.9009008308487
1992	45.7726458143936
1993	48.355248198583
1994	48.836736498097
1995	48.6427329755182
1996	45.604916896394
1997	48.5398753444819
1998	56.7646408062624
1999	56.4683231906621
2000	49.9370225396128
2001	53.6951810429657
2002	53.6408854056125
2003	52.1475674087657
2004	45.4684745333795
2005	38.7073699293723
2006	36.573032407304
2007	37.1422509908243
2008	31.7134061054152
2009	43.8413094891422
2010	39.8246878740329
2011	37.6958789477487
2012	34.5706605001228
2013	38.4221194197927
2014	45.7468922673782
2015	64.9164925390765
2016	77.5218358251858
2017	73.780161265812