Year	% of GDP
1970	12.771688165683445
1971	12.982676699261267
1972	13.306785930329696
1973	14.954402890351703
1974	18.01473658109474
1975	17.179821109405253
1976	17.601984260815925
1977	17.64735296399133
1978	17.44736275273806
1979	18.881822953433627
1980	20.22039537822038
1981	19.5609182982357
1982	18.594194391062207
1983	17.798661172928334
1984	18.090300343615446
1985	17.52148168141033
1986	16.66190944632179
1987	17.319810913271105
1988	17.79560057045723
1989	18.51024137545606
1990	18.875261978454557
1991	18.755425653802575
1992	19.83649684549687
1993	18.92405533017189
1994	19.482852232647563
1995	20.67887880584943
1996	21.122824156022503
1997	22.00078134235618
1998	21.821008326802705
1999	21.924021660700905
2000	23.526104706187567
2001	22.940202567838686
2002	23.19658140543058
2003	23.96144275811018
2004	25.837293949434738
2005	27.119706677259707
2006	28.802215093384227
2007	29.755699750894244
2008	30.938583018052846
2009	26.358487169636113
2010	28.675164281397237
2011	30.482218147632096
2012	30.260723369813096
2013	30.24513869621508
2014	29.908745612514753
2015	28.284492297430226
2016	27.324189817896382
2017	28.277291174978007
2018	29.1440727563981
2019	28.273571859660596
2020	26.325924393849405
2021	28.912302198934487
2022	31.020942396514307
2023	29.266622995335386