Year	% of GDP
1970	0.6910370558389589
1971	0.8167302806599808
1972	0.8183868229219176
1973	0.9969355451378556
1974	1.6988558990674567
1975	2.8480162377733778
1976	2.9163051820491606
1977	4.026248849331835
1978	3.4493003370452495
1979	3.667238604695476
1980	2.554069830945023
1981	3.2250290129785495
1982	3.421269330669946
1983	2.9872232408298562
1984	2.761301971592852
1985	2.906556682957286
1986	2.0912087569739706
1987	1.9266249399050546
1988	1.80570739368261
1989	2.457919425712076
1990	2.987770956022372
1991	2.5801777793668217
1992	2.358041718982502
1993	2.0297257825045882
1994	1.8113180794784014
1995	2.1416871375714917
1996	2.110211793481989
1997	1.8824018695283633
1998	1.546872205416712
1999	1.6640847470043583
2000	2.1729820998203673
2001	2.1610805259141888
2002	2.1590649350109943
2003	2.0773884744598465
2004	2.832332279735429
2005	3.2853664416603117
2006	3.5062166484271593
2007	3.872245501388203
2008	5.856886798790239
2009	2.941301252687339
2010	3.938218591651216
2011	4.593765616755304
2012	3.5460400697693975
2013	3.177501623106969
2014	2.4882569077632164
2015	1.5850632940692169
2016	1.5152045372829925
2017	1.7167390718986997
2018	1.9205649440981127
2019	1.746405142294847
2020	1.5340857690869654
2021	2.6472066431110344