Year	% of GDP
1970	0.32156851214177706
1971	1.0918165034212863
1972	1.2501584052743977
1973	1.6952219242613484
1974	1.0363078971606747
1975	1.0996819596274507
1976	1.050045790109032
1977	1.2207401293243827
1978	0.9647393158850671
1979	1.3245286143941961
1980	1.4296324268372298
1981	1.0420759545921272
1982	1.7744090293072843
1983	1.6210863546983079
1984	1.074599566013108
1985	1.1535040736982254
1986	1.2295579976153015
1987	1.4194535824391938
1988	1.2969948589850606
1989	1.3494831191884096
1990	1.3240545241601223
1991	1.10033477518521
1992	1.5306021382756334
1993	1.719054150572087
1994	1.6298789170315104
1995	1.8303045875563198
1996	1.9266466580895145
1997	1.3277868166436029
1998	1.4288429269017455
1999	1.0684763596110676
2000	1.0230235056558101
2001	1.0797119084787492
2002	1.0425194997355733
2003	1.3727858904863999
2004	1.0038474004541937
2005	1.244316269028914
2006	1.500694943811563
2007	2.2280068771646997
2008	2.635672643313243
2009	2.1695676982764174
2010	2.7471447506731326
2011	2.6727588479458766
2012	2.828472497923683
2013	2.796040670947267
2014	3.315186100719826
2015	2.8451130548670873
2016	2.4928953543426955
2017	3.636203619869994
2018	3.6308426570002172
2019	3.38709135033318
2020	3.647131983358822
2021	3.547336299010299