Year	% of GDP
1970	3.405147989573221
1971	2.7885929054450673
1972	2.7447138806147873
1973	3.822232168142927
1974	4.147587027411888
1975	4.0525790353451825
1976	3.16257116966617
1977	5.353292079108617
1978	4.493580516379747
1979	4.046910210318693
1980	9.001308207973736
1981	8.073010454001679
1982	9.388477924767464
1983	7.100463985787431
1984	6.479870492000283
1985	5.248300487619286
1986	5.599396173145809
1987	5.273957769125727
1988	5.9304282140988525
1989	6.237099183227247
1990	9.363381020117572
1991	6.87032797941256
1992	10.933448110701427
1993	11.158218389062316
1994	19.37913637991508
1995	18.110829260864413
1996	15.476222051340875
1997	13.471072300429121
1998	12.751145494210494
1999	10.449275258694932
2000	11.827143609282821
2001	11.185300881243684
2002	11.342041344080496
2003	14.07944686827269
2004	13.507429611886666
2005	14.661939355851251
2006	14.43431411637517
2007	14.460728261772566
2008	17.63563512292157
2009	12.067233041453754
2010	12.867241240083795
2011	17.92114245541258
2012	13.499895661669797
2013	12.512668676196686
2014	11.64376521178682
2015	9.287226181072855
2016	9.847560699563743
2017	10.061603145391283
2018	8.56907712575926
2019	7.592269006435405
2020	8.084263558182727
2021	13.259053741565271