Year	% of GDP
1974	16.794614917040004
1975	16.72634078317567
1976	14.810726963577245
1977	13.64206628582565
1978	13.500789166615487
1979	13.08028919330289
1980	12.357125632380079
1981	12.739382321878798
1982	12.18382614891343
1983	12.278195488721805
1984	12.81645569620253
1985	14.117962466487935
1986	14.401360544217686
1987	15.799999805825243
1988	16.8879875
1989	17.201298311688312
1990	16.97494739039666
1991	16.017777511111113
1992	15.621854780733285
1993	15.734536082474227
1994	16.017142857142858
1995	16.33823529411765
1996	16.53705318221447
1997	16.31553215494547
1998	16.97912317327766
1999	17.953511053315996
2000	17.997971184945605
2001	17.698076386952884
2002	18.49675376088678
2003	17.303832335329343
2004	17.23696682464455
2005	16.709545032497676
2006	15.97756192326372
2007	15.369924812030074
2008	15.522367392518147
2009	15.786154289004031
2010	16.102270843693024
2011	15.767194223616073
2012	16.165466555203917
2013	16.60837991829714
2014	16.774446366197182
2015	16.69744490772945
2016	16.841326928471247
2017	16.593520657020157
2018	16.35088958038661
2019	15.98829899213724
2020	16.380455994213825
2021	15.485283900665006
2022	15.970532299399046
2023	15.063909841069774