Year	% of GDP
1960	8.21621614515705
1961	10.7260410487488
1962	12.5704202253301
1963	20.2641013726915
1964	15.9705029805462
1965	13.9459459459459
1966	14.4702010712253
1967	14.1916167664671
1968	14.7462236635875
1969	15.6421025036554
1970	17.7631245222068
1971	18.5451950523311
1972	22.8359447004608
1973	20.5642458100559
1974	13.1199892386333
1975	14.4102508650519
1976	13.8708107356418
1977	18.0692552883222
1978	24.1064540059347
1979	19.1365187713311
1980	15.7692988275824
1981	16.2925202476417
1982	15.5585835645555
1983	17.72854600325
1984	16.1824315640663
1985	20.2063312229257
1986	28.5342326291677
1987	29.7400385127547
1988	16.7483582683015
1989	15.4787719955073
1990	12.9223127236826
1991	14.6340279267629
1992	10.9443611257482
1993	10.3152517572052
1994	6.75599656583784
1995	7.92178409825469
1996	6.5893298544356
1997	8.68058280531343
1998	10.7795085066163
1999	9.96367119470568
2000	8.69655229754448
2001	12.5213235669856
2002	12.3109535557091
2003	11.5183478998664
2004	9.270946511217
2005	8.46361766400408
2006	9.55302311116021
2007	9.95222909903567
2008	8.66117230938388
2009	10.091112978373
2010	8.20999683204116
2011	9.52767161179322
2012	11.3020956739669
2013	15.012821298493
2014	14.5417251249117
2015	14.5161472286238
2016	13.8289895507558
2017	10.2903622081637
2018	13.0826930691649
2019	13.3764779657931