Year	% of GDP
1963	12.6425016576235
1964	13.4125087304386
1965	13.0178531942213
1966	12.5498169899622
1967	12.7722298075757
1968	13.0571260615594
1969	13.6096241187785
1970	14.7624372347167
1971	15.6079935090307
1972	17.6006213024577
1973	17.0559109949957
1974	19.5179110537729
1975	20.6284807852514
1976	24.5752456143148
1977	23.8659226830375
1978	26.7680723121873
1979	25.3425138978815
1980	28.7858466612276
1981	30.6675107289077
1982	35.4112110368976
1983	40.6690286060946
1984	45.4336719476395
1985	46.7104948588576
1986	38.3316621052468
1987	33.9127266874248
1988	28.7307950509627
1989	27.7916029539866
1990	31.7335792305879
1991	27.8783452549073
1992	28.0878459213768
1993	29.6945047052543
1994	25.5268178597759
1995	22.4385827151461
1996	21.1867487966835
1997	21.053223099772
1998	20.7784038839948
1999	21.3125969715474
2000	17.5308068505319
2001	19.0602710619363
2002	18.2901841716185
2003	19.2749088152548
2004	18.7994473790331
2005	20.0189955597623
2006	18.5258636797215
2007	19.4710333076141
2008	18.1989159186957
2009	18.5670927985558
2010	18.9444605621404
2011	18.8862943524877
2012	19.4814718329654
2013	20.6764174581281
2014	21.7960611387149
2015	24.6907703542099
2016	25.9840395574101
2017	25.2247086175263