Year	% of GDP
1970	16.6274544591372
1971	19.3376376215014
1972	26.5027127241196
1973	31.8717246630029
1974	21.3331033462901
1975	25.1709799316532
1976	23.368594545098
1977	23.8172049158513
1978	19.4452433631194
1979	23.1974260192069
1980	23.1886797415834
1981	16.1901455414998
1982	23.8307849687422
1983	20.0352563290908
1984	11.2451678663241
1985	10.8721022388003
1986	15.83969113876
1987	19.5004726704471
1988	18.1589988505924
1989	19.0167783555675
1990	15.1078657792421
1991	14.5578073995552
1992	14.0674884224729
1993	11.807219069161
1994	10.5563997159449
1995	9.33343108359679
1996	7.3836911011018
1997	5.89071381123621
1998	5.97221254336863
1999	4.83620321689404
2000	4.25633373605828
2001	3.84919761755289
2002	3.53468056133445
2003	4.92997906617167
2004	2.89831247323068
2005	3.35021774131295
2006	3.75990568321402
2007	4.51490391769602
2008	4.11909757612888
2009	3.51056344704507
2010	2.9358826747592
2011	2.26771749790281
2012	2.28706087054873
2013	2.11103457955223
2014	2.50527420765292
2015	1.77211285104809
2016	1.61246329605266
2017	2.01543237647146
2018	1.97935469127175
2019	1.78983852103498
2020	1.86176683401628
2021	1.70393676123606