Year	% of GDP
1970	20.639834767093326
1971	25.3673653283652
1972	24.852598289494356
1973	24.40081184552093
1974	21.96521280886888
1975	24.809107360275156
1976	22.275339918666134
1977	22.417408515830406
1978	21.512100123677847
1979	21.804888742246074
1980	24.246881758081397
1981	22.7380006939855
1982	22.347246586337985
1983	18.993988259720293
1984	17.928908875419477
1985	15.805205665619445
1986	20.064743933649826
1987	23.139139812452804
1988	23.22044204429762
1989	22.69581225522193
1990	23.002125836202545
1991	24.770143323177066
1992	20.97853999941464
1993	23.265020599694225
1994	21.96379317296868
1995	21.152842810966625
1996	19.83972966774529
1997	20.62700261279908
1998	21.167449064360312
1999	23.15958640550534
2000	20.62506060747253
2001	21.87915948855541
2002	21.302678723289752
2003	21.048997557391278
2004	21.243282090525774
2005	19.34779138301507
2006	18.215054288882428
2007	18.91763814385261
2008	20.144083567629426
2009	18.019247418672673
2010	16.824087797208268
2011	19.21325376494699
2012	19.177531611302854
2013	18.45427294293663
2014	19.15173549730976
2015	17.309455467576704
2016	17.284838895369965
2017	17.81132299413376
2018	16.203412162811752
2019	18.080135439258584
2020	16.69354570118557
2021	18.18216781834821
2022	17.514789304647294
2023	18.13123885522995