Year	% of GDP
1964	6.01538489301776
1965	9.78494755174026
1966	10.1312417521331
1967	8.12358895572449
1968	9.24099787260185
1969	10.0037076304336
1970	8.98817619859456
1971	11.0904185531339
1972	12.7220268800714
1973	14.5688530561005
1974	18.0233602846918
1975	8.96191002338982
1976	7.00549560870279
1977	6.52980631186968
1978	6.33473089681164
1979	3.23843192996389
1980	3.22335402620003
1981	4.14244947930895
1982	6.28354128324841
1983	8.44966893600016
1984	8.53837864219827
1985	9.53442052812675
1986	10.267173583916
1987	12.5438221421912
1988	14.5123138709291
1989	16.3574305707636
1990	17.0742202865805
1991	12.9933459306063
1992	15.2149837519123
1993	17.9083722112189
1994	28.452955110498
1995	12.9787528638931
1996	10.2108328749652
1997	12.4701055796732
1998	12.7073872588409
1999	14.1133677694097
2000	12.4861894084611
2001	11.4450587101195
2002	10.3522571350577
2003	11.6116636313783
2004	8.31790354677026
2005	7.259297383745
2006	7.33393369008841
2007	8.60115258513795
2008	8.85035940967436
2009	7.19307112423881
2010	8.39613952943584
2011	9.15890813585012
2012	13.4160655442691
2013	12.4700111162654
2014	17.3108771494362
2015	19.1654784139155
2016	18.93024894681
2017	18.9533405161547
2018	19.573569078406