Year	% of GDP
1963	11.5319854714712
1964	13.0028387362783
1965	11.6865908608684
1966	12.5869964108076
1967	13.5699535675991
1968	13.716835766805
1969	13.343183083649
1970	13.8952835385033
1971	16.1466969415315
1972	17.7205264553648
1973	17.98614116728
1974	19.2399136261582
1975	22.9296112982857
1976	25.0613837624572
1977	25.7253871575805
1978	26.861275508451
1979	27.2286358159325
1980	28.7802316538549
1981	29.5788582579045
1982	32.3480570491316
1983	34.0533369400505
1984	32.3961703252779
1985	29.7169317275909
1986	28.5901367762965
1987	28.2338135437417
1988	28.7863553950513
1989	28.1410535872941
1990	29.6399079788048
1991	27.0573920431808
1992	27.3596747906971
1993	26.6763243060376
1994	24.5301145510459
1995	21.8551026581376
1996	21.8696189148147
1997	22.2342282510873
1998	22.9903504118351
1999	24.2675026768982
2000	22.2462369683824
2001	23.3259981402483
2002	22.7415619466643
2003	21.5805015058104
2004	20.4375681955434
2005	20.3231774389849
2006	18.7551563591571
2007	18.6701334661175
2008	18.8973078898417
2009	19.79126485508
2010	20.1403970704364
2011	20.9010569496832
2012	21.4390947261494
2013	22.0632772211968
2014	23.3100482291029
2015	25.5995978458807
2016	27.8669094197568
2017	27.7293761290423
2018	30.6810326777353