Year	% of GDP
1975	0.5340909090909091
1976	0.9001312910284464
1978	0.7189578947368421
1979	0.8897517926988266
1980	0.6318798550039962
1981	0.382868959987846
1982	0.9317311304556449
1983	1.9402306451420053
1984	1.9866389940010827
1985	2.002652418557327
1986	4.102380107599881
1987	6.133823426856388
1988	8.369530151877363
1989	12.231084484360371
1990	15.712697588325403
1991	32.81602888143059
1992	38.2048760680696
1993	37.8876095037182
1994	23.526292800838515
1995	23.85694539469806
1996	24.70635128412708
1997	29.915971050946023
1998	16.45779401774433
1999	24.40301564386949
2000	16.872436953448613
2001	15.86031855730807
2002	12.82169661266429
2003	16.005873577084877
2004	20.916475679827634
2005	26.060950875975742
2006	34.14261101160694
2007	36.07952427019983
2008	20.15016339044844
2009	37.31518746167261
2010	41.10143455163776
2011	33.253480320342156
2012	41.83350481502266
2013	39.62643208194844
2014	35.19550045782939
2015	33.153804843183785
2016	31.540998758536283
2017	35.022507650892585
2018	30.649635751654063
2019	31.68980164571727
2020	35.65356386507126
2021	35.010144366152076
2022	31.050571469803153