Year	% of GDP
1997	3.6468781817339133
1998	4.013411694182679
1999	3.4564101389154827
2000	0.5621479289831585
2001	0.3948809283523719
2002	-0.3819600853994488
2003	1.2665267309649295
2004	0.25280195037445735
2010	2.551303370929967
2011	1.3930288971956277
2012	2.546604792250323
2013	1.8108616102456616
2014	2.2820020675102954
2015	2.666961307382921
2016	2.100826093057973
2017	3.552079657979374
2018	1.1186746100733458
2019	1.716698606336825
2020	3.343550942979684
2021	2.900044808379378