Year	% of GDP
1990	1.1432498317648554
1991	1.2646540610138697
1992	1.1814042759383347
1993	2.1294304152947974
1994	3.208919580135272
1995	2.524033413131342
1996	3.7299608668140305
1997	3.6707358136587716
1998	3.9240865093613424
1999	4.361029310963416
2000	4.5151212982194755
2005	3.0596357602581765
2006	2.948036581501961
2007	2.550766806085955
2008	2.265784070087333
2009	2.303021050968586
2010	2.269670017175388
2011	2.4923805279950964
2012	2.637705553611786
2013	3.0221731822031477
2014	3.177711143161678
2015	3.2284589010006775
2016	3.217080817659943
2017	3.0564999715998997
2018	2.8524004168185644
2019	2.2504782616823595