Year	% of GDP
1968	23.018430719317017
1969	23.247608438946056
1970	29.237953549880157
1971	36.06725191550082
1972	43.311863391252245
1973	78.78853512381777
1974	49.73389737991266
1975	51.60092384367593
1976	35.47800300964858
1977	24.85957150668589
1978	7.719032070099058
1979	20.61244141321175
1980	36.15543835098405
1981	32.72550519998653
1982	11.613373587089356
1983	-9.207955400996665
1984	-10.700544171857727
1985	-6.571304056675471
1986	-9.083286752375628
1987	-6.270818337898178
1988	-3.879050826124973
1989	-4.331704311539916
1990	8.961579933034447
1991	1.9175000403896796
1992	3.1215791380499187
1993	0.898657536172221
1994	7.930584911996523
1995	9.633955515815357
1996	13.391821821602818
1997	13.12912889721238
1998	3.1763709829798987
1999	11.486893158256642
2000	18.644089260863876
2001	15.706804766290716
2002	17.30480913389459
2003	21.877127665489898
2004	26.887825510701518
2005	32.147410038098066
2006	29.71921181219009
2007	25.011563181802725
2008	28.12037319198579
2009	9.318899744393976
2010	16.589701920004117
2011	26.34315711481922
2012	24.831655066236223
2013	20.92460820547069
2014	12.934730128163208
2015	-4.376025167233206
2016	0.4128928928928929
2017	5.3171865151441695
2018	12.441439145692696
2019	7.980206180846132
2020	0.09046612023822624
2021	8.406493425277258
2022	16.928886016189484
2023	7.371392973435818