Year	% of GDP
1970	0.8830803829832159
1972	0.2891457648229287
1973	0.7573185311985511
1974	0.3640688285364295
1975	1.0971471973755729
1976	0.6016556896155142
1977	0.6996203653207683
1978	0.8974119666023151
1979	0.4566295770276779
1980	0.37621058625920056
1981	0.654481272500411
1982	0.19510263187670734
1983	0.05860226311487882
1984	0.12242893797308148
1985	0.10143369581584777
1986	-0.12212821212602286
1987	0.3042506594402002
1988	0.4859782987118955
1989	1.0481900304836158
1990	0.30909976154523544
1991	0.37200952074345495
1992	0.9109051700954366
1993	1.0767528928905672
1994	0.6871153458816537
1995	0.2927495472923927
1996	0.39511514848593376
1997	1.150180908140069
1998	1.4924327108042423
1999	1.7058278271800593
2000	1.5233364602260044
2001	2.50813886629199
2002	2.639710092445029
2003	3.2873922424953514
2004	3.209740722329728
2005	2.048186114081063
2006	3.0205312387537795
2007	3.356143346406676
2008	3.570339561574729
2009	3.199400325243783
2010	4.159831074187607
2011	4.4714326558105695
2012	5.98471426108954
2013	5.099369960245311
2014	3.6138150114526835
2015	3.65651082960421
2016	3.5811024080517964
2017	3.4052249470829117
2018	3.1956426599251917
2019	3.417032049227226
2020	3.329937822322768
2021	4.257415825277331
2022	4.005612520330728