Year	% of GDP
1972	0.3709298878021078
1973	0.5284887828861581
1974	0.28542506175536003
1975	0.4838096973851935
1976	0.39568289799012885
1977	0.4520348061281755
1978	0.5353759378157315
1979	0.4246692433662962
1980	0.38166204222867983
1981	0.37226763914560473
1982	0.2724725457490583
1983	0.1065517872312719
1984	0.1465081369368638
1985	0.1361202171514336
1986	0.07189815651112198
1987	0.3537525071667441
1988	0.40720673469483615
1989	0.6934699152356069
1990	0.5045063994066145
1991	0.4613239377597094
1992	0.8376856296583599
1993	1.1164441545862909
1994	0.9412302703930054
1995	0.8580819379205755
1996	1.0115729109936156
1997	1.6319614644264098
1998	1.6660017712363249
1999	1.7457442061921844
2000	1.5914403242439552
2001	1.8516329037949377
2002	1.835259714796729
2003	2.1758519293290774
2004	2.4716149578806834
2005	2.2273847754983263
2006	2.6405358588823735
2007	3.3199512789625802
2008	3.6434386814899797
2009	2.8698558052352783
2010	3.5018599325845
2011	3.8743289383828685
2012	4.359202658435052
2013	4.0729317812221595
2014	3.2404880855197797
2015	3.4871722375422487
2016	3.0713954281750686
2017	3.0252064567729566
2018	2.6691012068599687
2019	2.5525957554664602
2020	2.279984659549623
2021	2.833901640211071
2022	2.507866018973769