Year	% of GDP
1981	0.4097149225184741
1982	0.2873736837874219
1991	0.5286480872372444
1992	0.836844382469444
1993	1.2265273123099987
1994	0.9384179131595142
1995	0.6138505673321942
1996	0.4590929667892062
1997	0.7060526987802138
1998	0.7174047797784573
1999	1.9920662018269126
2001	1.639468670558514
2002	1.6455053171891405
2003	1.5987048939858868
2004	1.9380314308745161
2005	3.7458642111482763
2006	3.4152478197404816
2007	3.0546115270078524
2008	2.723903085726484
2009	2.8891904477690193
2010	2.7381317153683553
2011	2.5690006775393943
2012	2.373066203456101
2013	2.2517771657205032
2014	2.1632345708418894
2015	2.598259909840719
2016	2.7529239816962985
2017	2.9752559797909
2018	3.146762514448923
2019	3.0696945995464207
2020	2.763368507293456
2021	2.918276815751762
2022	2.7175442769252713
2023	2.7949547440575255