Year	% of GDP
1968	16.21093631537707
1969	16.82772020690737
1970	15.856682370443838
1971	13.33871017774607
1972	12.727181945276614
1973	14.157822539888818
1974	8.431545256053989
1975	14.531088555278673
1976	16.852261662388244
1977	18.323958687830043
1978	24.266778074621342
1979	21.653570535567034
1980	15.89039444189696
1981	19.54931845927038
1982	26.18429418236779
1983	29.764188147563903
1984	30.137727192936676
1985	31.901476942373208
1986	34.66648034283585
1987	35.22252446787627
1988	30.93316874370309
1989	33.59556383291557
1990	29.01628738437092
1991	34.1551286815193
1992	29.741679879390876
1993	26.302250158143643
1994	24.208758864547736
1995	23.457210983197346
1996	24.366407434646437
1997	26.03156062258863
1998	28.195811107396697
1999	25.409810384886196
2000	25.86308062267037
2001	27.32666585567894
2002	25.950955104061478
2003	24.484510286316585
2004	22.859103993371004
2005	21.340281823344878
2006	22.039247859178698
2007	20.66207475236187
2008	17.704251610116366
2009	22.187013125832365
2010	20.202829495697898
2011	19.234880073146314
2012	19.81277793134783
2013	22.232889233503315
2014	25.711812971602615
2015	29.321635041659928
2016	25.01029029029029
2017	23.53315455966105
2018	23.600579458334344
2019	23.404082785254044
2020	27.95820763045952
2021	23.80438579231472
2022	20.829617840906604
2023	23.330983685014573