Year	% of GDP
1970	2.0018265584174606
1971	1.818953121099748
1972	1.837771841115531
1973	2.30013179846347
1974	1.9929475581765714
1975	2.323752740506205
1976	2.0503338968330587
1977	2.950250560296396
1978	2.917910116324831
1979	2.5857954039800863
1980	2.4206393924847536
1981	1.7302484889032288
1982	2.4880507832099164
1983	1.9953305581449985
1984	2.1097807111934346
1985	1.9465887270018405
1986	2.8363100877601983
1987	2.556734909627921
1988	2.693187089556897
1989	2.826972334642278
1990	3.0328476293461604
1991	2.839288595411197
1992	3.460805975973398
1993	3.4215341468180873
1994	4.081217651081161
1995	4.9992088637191445
1996	4.636532650046509
1997	4.1467895591463835
1998	4.329464224803648
1999	3.027741564782524
2000	2.9241535836644688
2001	2.9556681085009644
2002	3.277276287473166
2003	3.9727200442151425
2004	2.7345858284776865
2005	2.509104735348481
2006	2.2087856852235372
2007	2.6454688889507576
2008	2.8437006790854693
2009	2.934136733991695
2010	2.2462215317102054
2011	2.320084203465193
2012	2.577013158665961
2013	2.5740526976673053
2014	2.709128381695096
2015	3.150034683533841
2016	3.6132212578204532
2017	3.386606934027538
2018	2.3374776283235406
2019	2.1725978389287692
2020	2.499931904622345
2021	2.371403325807983