Year	% of GDP
1970	19.903800972814352
1971	20.450963614425277
1972	25.720474173862414
1973	26.432977893780933
1974	25.941965617646375
1975	24.500693508437756
1976	24.356831337486454
1977	24.89121754825119
1978	25.564875857125813
1979	25.960600444564196
1980	25.778333898273146
1981	25.281915025114227
1982	24.33232476042556
1983	23.91719753092662
1984	24.181331611687924
1985	24.25349572751874
1986	24.402196101174628
1987	24.670606586524116
1988	25.31424078703266
1989	25.54312247539064
1990	25.29802768366537
1991	24.711047878067212
1992	24.038134982845698
1993	23.517552421053434
1994	23.508180263916785
1995	23.657660630923047
1996	23.760493541747923
1997	23.407208392380046
1998	23.259524115607906
1999	23.595420901854542
2000	23.90382218956266
2001	23.223710792475334
2002	22.30224997606535
2003	22.202427777971387
2004	22.38233721215147
2005	22.88385564459932
2006	23.20534396534869
2007	23.084583986870967
2008	22.700336203761854
2009	20.868448526430708
2010	20.468951018269877
2011	20.77061923205406
2012	21.056437125802013
2013	21.007114481598123
2014	21.240142510940306
2015	21.40659736065353
2016	21.440568136172956
2017	21.755588202441057
2018	21.967730540256504
2019	22.079639863771117
2020	22.220703750992325
2021	22.216848771534266
2022	22.26755610925908