Year	% of GDP
1972	10.08849557522124
1973	10.419681620839363
1974	11.666666666666666
1975	12.545454545454545
1976	13.129102844638949
1977	12.979989183342347
1978	12.665810868635003
1979	13.168187744458931
1980	10.87279277537891
1981	12.571509642313103
1982	21.955527762721637
1983	21.040037135185667
1984	18.658382418182637
1985	20.529604782775802
1986	24.904714048971382
1987	27.33049256499975
1988	23.800133473881907
1989	19.341707122928526
1990	16.918575244642117
1991	13.772678697272092
1992	13.362054402017442
1993	10.268390267815239
1994	10.40483046757767
1995	11.284373932515408
1996	11.111571803661219
1997	11.68031424199076
1998	10.541591597024222
1999	11.375071343139757
2000	12.096492933276068
2009	20.577968077451438
2010	20.481549753203158
2011	20.874073797000346
2012	20.932432601798027
2013	20.69097508535759
2014	20.99717636433161
2015	20.868951151725387
2016	20.328199416259622
2017	19.86649209281969
2018	19.86970970988352
2019	19.793564829298752
2020	21.702568555478173
2021	20.948067780546328
2022	22.360824110576353