Year	% of GDP
1977	0.48324238581449724
1978	0.6390210481305235
1979	0.6900958587859425
1980	0.7547169811320755
1981	0.6861642187851519
1982	0.4371584699453552
1983	0.6791171477079796
1984	0.6828703813657407
1985	0.5154639175257731
1986	0.19079686285072953
1987	0.21428570459183668
1988	0.24117139982773472
1989	0.36859565057132326
1990	0.12873326467559218
1991	0.9149743148850703
1992	1.1369253348986654
1993	0.8162985320345727
1994	0.03303096085831197
1995	0.03855846508481008
1996	0.03869791812529439
1997	0.043176844906076865
1998	0.1215285613719224
1999	0.25950852897757837
2000	0.13190218134231654
2001	0.02397278574982859
2002	1.3807930617144637
2003	1.8443084827599314
2004	0.6131693371882599
2005	0.21746277403551745
2006	0.07995795170691092
2007	0.09534797171566803
2008	0.0622705712518045
2009	0.11869712351945853
2010	0.09843486283665473
2011	0.08804932076432581
2012	0.1617970030120482
2013	0.13591182980512959
2014	0.16856463740515837
2015	0.13080859621773244
2016	0.04502121601475055
2017	2.7261021704180104
2018	2.4693154627212195
2019	2.3948309912434618
2020	4.259507170037091
2021	4.790550686026221
2022	4.091983092462278
2023	3.8835919502267715