Year	% of GDP
1970	0.42797398163845146
1971	0.4233142037495128
1972	0.4114330386251732
1973	0.4459848617763867
1974	0.5630637076539032
1975	0.3882615808661236
1976	0.3220470240832372
1977	0.38179795962931945
1978	0.39048038551237213
1979	0.4571279286500076
1980	0.5739744329982334
1981	0.5823345775864393
1982	0.4954785300476619
1983	0.4274800210789611
1984	0.47597362884442884
1985	0.3241932444146413
1986	0.5872704451559768
1987	0.9241777012229266
1988	0.9345386354432329
1989	1.085372217986362
1990	1.1705554853972293
1991	0.7263237939392996
1992	0.664532906392901
1993	0.7790660745705965
1994	0.8258381227061399
1995	1.041877466952786
1996	1.1295003651651387
1997	1.4358436403438313
1998	2.4438845147925012
1999	3.81672591822007
2000	5.046685366553573
2001	2.639197716698172
2002	1.9860834787084805
2003	1.6509740744054717
2004	2.145307929182073
2005	3.244581614199965
2006	4.294807286542938
2007	5.679901504641112
2008	3.748741768873273
2009	1.7764790411717448
2010	2.456021354187475
2011	3.0142697363040676
2012	2.3026401196923296
2013	2.4371140352037584
2014	2.0293380562888705
2015	3.5499013288123797
2016	4.095448418118463
2017	3.0167158045394915
2018	0.3603111448156078
2019	2.2575777189131685
2020	1.1278497055343926
2021	2.2136642176839314
2022	1.7946133689642576