Year	% of GDP
1970	12.74147517724228
1971	14.479839945322771
1972	16.77679391852252
1973	20.856908262773104
1974	48.759572069018795
1975	39.398728221141994
1976	38.17258610003916
1977	35.98315248947824
1978	33.937267653506
1979	53.74932295298051
1980	48.85354484453552
1981	37.701139051693495
1982	24.991315983838863
1983	23.115838926947692
1984	22.62056589959649
1985	19.589862582728237
1986	11.418593670321606
1987	16.72767024818102
1988	16.34660840642696
1989	23.059750965009094
1990	24.39514671185555
1991	20.72471409499838
1992	20.96147231412106
1993	21.912367690096072
1994	20.926896042064037
1995	17.08925808872572
1996	19.218425093894293
1997	17.335671626379295
1998	12.06377195407792
1999	15.775401548053377
2000	24.614938451129085
2001	20.098950813322663
2002	19.54664989168782
2003	21.77046796834142
2004	25.901872438264974
2005	31.781618908726937
2006	32.65565901395008
2007	29.920975127831507
2008	33.81109431831215
2009	21.843901359458265
2010	24.881391481950715
2011	30.612724378797285
2012	29.833634910023072
2013	28.442752693089492
2014	25.73130853947084
2015	15.428565532207742
2016	12.973287050102341
2017	16.336790737745567
2018	21.820779612338978
2019	18.763051987845113
2020	12.565417919812882
2021	18.722508758359677