Year	% of GDP
1975	1.3229696573027387
1976	7.9963961563675605
1977	10.281262116838171
1978	12.556756558131172
1979	18.990152379401774
1980	19.465998875947548
1981	19.8858461842508
1982	19.00672908066582
1983	17.506818284912942
1984	22.222223194712736
1985	22.122526721930345
1986	24.723591562168675
1987	23.85686634389034
1988	22.70654572314092
1989	24.49821101023541
1990	21.438348241671513
1991	15.833548924317508
1992	17.515872603001263
1993	23.654073984803752
1994	25.118470009408924
1995	25.72592778204376
1996	23.826583598794862
1997	22.69562665844384
1998	21.565760220614678
1999	22.585502983539847
2000	23.009932721918048
2001	22.463479768704104
2002	21.630361175097796
2003	21.195414225045013
2004	21.94657185444864
2005	21.91539562062745
2006	21.669619371678206
2007	19.62405560343816
2008	16.193454288512275
2009	17.52806204366332
2010	15.730008853033024
2011	15.164984521410066
2012	14.370359283218601
2013	14.559643146533885
2014	14.583116810986615
2015	16.39126683772703
2016	19.308280883753163
2017	20.30249735605399
2018	20.69427608045086
2019	20.842690504130733
2020	19.602667069203967
2021	23.39688931518961
2022	21.668884328761205
2023	20.92811039469283