Year	% of GDP
1974	21.02824212730181
1975	17.32097813053881
1976	15.006435589199949
1977	15.364908647369738
1978	9.84961623495246
1979	9.223271703528626
1980	3.4847030327479143
1981	7.45203816056076
1982	7.9814789504911525
1983	5.2128819687953785
1984	4.958885789323166
1985	5.080017378000788
1986	2.6309686283971487
1987	5.94321416826488
1988	2.6463996896959743
1989	2.706923208600395
1990	2.5716747678637337
1991	3.0169264338900565
1992	3.7482174688617946
1993	1.4922602773619236
1994	5.815936464829273
1995	8.491258919338398
1996	7.9803454666696405
1997	10.761934567763015
1998	11.13823155819901
1999	11.540253068304434
2000	11.277395039459298
2001	14.670522012262904
2002	13.032173271388148
2003	14.528749152922735
2004	13.564609663576583
2005	15.318463685687004
2006	13.40037883119696
2007	15.154317620950236
2008	14.907729851918216
2009	14.983634066867207
2010	16.28259413194463
2011	14.382645163548633
2012	15.845531418818211
2013	16.28849940961148
2014	18.95045390862185
2015	20.14248357334081
2016	21.154966110266997
2017	22.543396382376418
2018	23.05966529658421
2019	24.02290541690574
2020	25.489253816513997
2021	26.002598301646106