Year	% of GDP
1973	0.01203792410278815
1974	0.01880163189593743
1975	0.02077919288794679
1976	0.01802747921230014
1977	0.0195677337281212
1978	0.0214123445758706
1979	0.03235701290008717
1980	0.036420771042516085
1981	0.015569551433577767
1982	0.007203434222084273
1983	0.035587219296525426
1984	0.04038744001406254
1985	0.04674255724631757
1986	0.05542151872381745
1987	0.04975779747136794
1988	0.044244389190164185
1989	0.06489928821758996
1990	0.06189544113806613
1991	0.0737792170689545
1992	0.06747173164569996
1993	0.16360105355491975
1994	0.1851651268038282
1995	0.17309471689642186
1996	0.16862975615600287
1997	0.16721186650171707
1998	0.12704414435843378
1999	0.1060136271160952
2000	0.3046923803651331
2001	0.397832645929179
2002	0.2940472464251565
2003	0.42874657259317456
2004	0.40011195460155846
2005	0.18341982891550898
2006	0.4944799569993528
2007	0.5161888725709087
2008	0.5558786228927892
2009	0.41101155322747746
2010	0.49451645640104075
2011	0.7326711049284436
2012	0.7531204977143916
2013	0.5876410350828455
2014	0.5859336286370017
2015	0.49866656824752154
2016	0.3680008007023886
2017	0.48216707417235555
2018	0.6925100568967436
2019	0.6252058953654295
2020	0.4751466832713948
2021	0.8124757710465501