Year	% of GDP
1960	8.275862068965518
1961	10.227272727272728
1962	13.402061855670103
1963	12.875536480686694
1964	13.432835820895523
1965	13.843351548269581
1966	13.230769230769232
1967	14.132379248658319
1968	13.179972936400542
1969	15.04727419030376
1970	16.67924528301887
1971	16.83424303361103
1972	13.078643951127173
1973	10.712183637433785
1974	15.038732080847653
1975	14.014663127291113
1976	14.397067080622255
1977	12.735688694788044
1978	12.835025578085007
1979	11.982554162928484
1980	12.452822003383801
1981	14.443093385214006
1982	15.704323877546367
1983	14.53063086176915
1984	13.593339628766193
1985	14.44705351472407
1986	14.32827708268525
1987	13.224361613258125
1988	12.177228163584255
1989	12.342403060152906
1990	12.097318140910454
1991	11.961842325935875
1992	11.584077200431823
1993	12.175448807422645
1994	11.871454916416512
1995	11.839200806151684
1996	12.81098519885004
1997	11.041626360505632
1998	10.898041011841167
1999	12.19134738052624
2000	12.356048750422366
2001	12.49204212068911
2002	12.347794348048062
2003	11.989088589395234
2004	11.005018573823392
2005	10.935458003711062
2006	11.285263864909393
2007	11.480183182568314
2008	12.213086491613113
2009	12.943794067195268
2010	12.64589594907998
2011	12.760458646106315
2012	13.273834491651979
2013	13.522429781728263
2014	13.696393007255875
2015	13.835809997370383