Year	% of GDP
1968	7.747413230258634
1969	7.708312921083313
1970	8.21555500454583
1971	6.781028011291373
1972	5.949171160375474
1973	5.248718504079128
1974	4.859319174275506
1975	5.000303895946028
1976	4.573780649730017
1977	4.211134096305842
1978	4.433963301340194
1979	4.938846299123792
1980	3.9847930417752897
1981	4.730439692829425
1982	4.780196979445458
1983	6.140877639551142
1984	7.566930291917126
1985	7.775338942064956
1986	7.506676603937644
1987	8.805942710426852
1988	8.82521125865684
1989	8.48669009844146
1990	8.303501503887407
1991	8.282509653133431
1992	8.756432681332466
1993	8.813872460915928
1994	9.049048851312644
1995	9.29417681904549
1996	9.488194873365636
1997	9.771146872093883
1998	10.17826775773608
1999	9.94477597911744
2000	9.227065307782253
2001	9.603832496278146
2002	9.881550781832349
2003	10.318567515034987
2004	10.102310356875261
2005	9.362586541281846
2006	9.439592601015521
2007	9.768306553581635
2008	8.808262510786266
2009	10.64745447347831
2010	10.828376945006934
2011	9.933553507949144
2012	9.726927676651197
2013	9.89981577592013
2014	10.831780746438326
2015	12.83363990430843
2016	13.198278278278277
2017	13.293637621539368
2018	12.56954618231896
2019	12.489116325098946
2020	12.637873672107345
2021	13.207192613980418
2022	14.435875792581587
2023	14.788122003199252