Year	% of GDP
1970	12.700614844676924
1971	12.702014070639578
1972	15.376932662715408
1973	20.213725044845074
1974	46.576777652167145
1975	37.67510298248428
1976	38.16464621694362
1977	36.18148142729547
1978	32.8654791923111
1979	57.56206772793069
1980	50.41214205853442
1981	38.55286606371825
1982	25.54522170158306
1983	24.508722571374538
1984	24.233969502495505
1985	21.228139100619348
1986	13.385372609833622
1987	16.837525012045628
1988	16.050822938248896
1989	22.190959659914622
1990	22.425576621544366
1991	17.73851347678554
1992	19.611889397144505
1993	19.245247808856885
1994	18.597225628662166
1995	18.203344195418374
1996	21.19222182062999
1997	18.603390282414644
1998	12.642449086069918
1999	16.760003518884243
2000	26.20421185943591
2001	21.08019453105514
2002	20.432599331162226
2003	23.031437342744724
2004	27.57293626811338
2005	33.02093936235393
2006	33.61675969894477
2007	31.240033172402793
2008	35.07682377818721
2009	22.314899841556215
2010	25.89700741251915
2011	32.659716258579834
2012	32.251284471933836
2013	29.684140494433784
2014	26.45244918702785
2015	15.452246842175217
2016	13.12023571158237
2017	16.63427019232798
2018	21.0547439831697
2019	18.463870118503706
2020	11.384041040781478
2021	17.247882347766797