Year	% of GDP
1970	2.001826558417461
1971	1.818953121099748
1972	1.8377718411155315
1973	2.300131798463471
1974	1.9929475581765705
1975	2.323752740506205
1976	2.0503338968330587
1977	2.9502505602963964
1978	2.91791011632483
1979	2.585795403980087
1980	2.4206393924847536
1981	1.7302484889032288
1982	2.488050783209916
1983	1.9953305581449985
1984	2.109780711193434
1985	1.9465887270018412
1986	2.836310087760198
1987	2.5567349096279215
1988	2.693187089556897
1989	2.8269723346422775
1990	3.03284762934616
1991	2.839288595411198
1992	3.4608059759733973
1993	3.4215341468180873
1994	4.081217651081161
1995	4.999208863719145
1996	4.636532650046508
1997	4.146789559146385
1998	4.32946422480365
1999	3.0277415647825245
2000	2.9241535836644688
2001	2.9556681085009626
2002	3.2772762874731645
2003	3.9727200442151425
2004	2.7345858284776874
2005	2.5091047353484814
2006	2.2087856852235372
2007	2.645468888950758
2008	2.84370067908547
2009	2.934136733991695
2010	2.2462215317102046
2011	2.320084203465193
2012	2.5770131586659604
2013	2.5740526976673066
2014	2.7091283816950957
2015	3.150034683533841
2016	3.613221257820453
2017	3.3866069340275393
2018	2.3374776283235406
2019	2.1725978389287692
2020	2.499931904622345
2021	2.371403325807983