Year	% of GDP
1971	0.5064227259182127
1972	0.538416890385848
1973	0.512366636358955
1974	0.5175448777112331
1975	0.4681613781856722
1976	0.48948262724946706
1977	0.46429622108666285
1978	0.46971321832083995
1979	0.594151604556863
1980	0.5015691367875127
1981	0.5926801012713397
1982	0.45037306139658506
1983	0.5138648281394883
1984	0.6723560226293772
1985	0.6053479048591127
1986	0.8266304767392867
1987	0.8594367232393563
1988	1.1169088094133433
1989	1.4958517032938823
1990	1.748293283773803
1991	1.3549214466100392
1992	1.1741607202742939
1993	1.0505870257833305
1994	1.238822661130356
1995	1.4352713066728333
1996	1.9218236775312398
1997	2.2107966429159336
1998	3.883728399245478
1999	7.017250220135533
2000	8.496049748593187
2001	5.554678582989555
2002	2.6171804770237754
2003	2.678732662524889
2004	3.5927746501572435
2005	7.5373166184772025
2006	9.295596819391578
2007	11.119137317513019
2008	7.276245830074907
2009	3.9061940077250163
2010	4.3698715659690315
2011	5.893502095941909
2012	3.9062276404250964
2013	4.8003924585791795
2014	3.6720991705479977
2015	6.9108540369050235
2016	5.611277271204616
2017	4.206353746077192
2018	0.9226125084201832
2019	3.254194188192314
2020	1.0746156767114834
2021	5.074050386410777
2022	2.6162496712678327