Year	% of GDP
1970	0.0156688439786595
1971	0.0551276822693913
1972	0.0644778111666937
1973	0.0966253001839665
1974	0.401813017550154
1975	0.280814902169639
1976	0.220074807046092
1977	0.21249292669636
1978	0.196069037564345
1979	0.362416289836324
1980	0.401503128730753
1981	0.3188942887484639
1982	0.21439906225499542
1983	0.2821515478637988
1984	0.4127884713354057
1985	0.38522682310632783
1986	0.14743194723016878
1987	0.9758908809396765
1988	3.624189094212531
1989	5.795306522677468
1990	6.5819165712944265
1991	2.9216184404333094
1992	2.863087123381133
1993	2.530150376980525
1994	2.3010048401683783
1995	2.3482934022611746
1996	3.149251808738678
1997	2.420528788968503
1998	0.7764125323339341
1999	2.6172676032777527
2000	5.5835287364450155
2001	4.337129543545617
2002	4.4023993300395485
2003	4.619962158935761
2004	5.2360702978551625
2005	6.372893129954267
2006	6.302475909766105
2007	5.649504362901679
2008	6.809132615913668
2009	4.746838473680264
2010	4.7052404105269074
2011	6.3986014149549275
2012	5.920665271188308
2013	5.26830851497474
2014	5.21336899944072
2015	2.8687544695884095
2016	2.3369449188537463
2017	3.225202309486479
2018	5.064380900622621
2019	4.437128823608496
2020	2.3174854275016044
2021	4.897220163204555