Year	% of GDP
1970	0.210334451463134
1971	0.215820075582649
1972	0.173227090193745
1973	0.196722446599599
1974	0.32297859772317
1975	0.336492711845825
1976	0.387246717020508
1977	0.37467128510667
1978	0.234297514191542
1979	0.213486576382673
1980	0.271179611346657
1981	0.494648107307618
1982	0.614484074496494
1983	0.540891495198632
1984	0.504742811394374
1985	0.567331103179582
1986	0.250038669910627
1987	0.212709968078142
1988	0.368391188286482
1989	0.350537840777163
1990	0.251729117844639
1991	0.244395727200361
1992	0.164472854214858
1993	0.0918403047212441
1994	0.0712772435003715
1995	0.0687082241301798
1996	0.0726895930137926
1997	0.0461644618965255
1998	0.0272530804439966
1999	0.0289833754564255
2000	0.0725973270627876
2001	0.100438252898655
2002	0.0501776299825581
2003	0.0384061803009328
2004	0.159020771049669
2005	0.132002912694051
2006	0.19079103863882
2007	0.322972796513128
2008	0.347201010426443
2009	0.120220920285001
2010	0.271313475376967
2011	0.357427754438088
2012	0.234074144784244
2013	0.161354239227532
2014	0.12477838312053
2015	0.0713511198951637
2016	0.0905977627072228
2017	0.107741216363758
2018	0.107923693978732
2019	0.0704760678864166
2020	0.0388459707205932
2021	0.0875219452812631