Year	% of GDP
1970	2.1286248561035666
1971	1.9287124341836097
1973	3.226569467689012
1974	2.7458820172812652
1975	2.8529206226196577
1976	3.0582052400776885
1979	3.940598726036266
1980	4.325072919352504
1981	4.487180382867177
1982	6.536734587792241
1983	4.550463532842536
1984	3.9214771341557144
1986	4.389120442971858
1987	3.896489612602893
1988	4.103509212232808
1989	4.021105137218464
1990	3.9572465526191682
1991	3.7340815464357653
1992	5.599991079888587
1993	4.488391932604645
1994	5.463842253323028
1995	7.98698501605884
1996	7.631814226974417
1997	6.62635211402408
1998	6.74079360181429
1999	4.352363646788301
2000	3.8463068764551234
2001	3.8983745289848066
2002	4.254576705797857
2003	6.01692793205184
2004	4.603860273879767
2005	4.040738847311392
2006	3.6027363767341516
2007	4.378753827455329
2008	4.349885138373581
2009	4.349109410456075
2010	3.571463873015552
2011	3.697995260585728
2012	3.9149758220242177
2013	3.8165103383363794
2014	4.022927961953455
2015	4.245431001342168
2016	4.40380931798963
2017	4.017366848685308
2018	2.676091993264631
2019	2.4941608713362733
2020	2.70819172411089
2021	2.615806408827823