Year	% of GDP
1970	2.10519003868103
1971	2.26543998718262
1985	1.39584994316101
1990	1.04070997238159
1998	4.19833993911743
1999	4.23087978363037
2000	4.2302098274231
2001	3.83357000350952
2002	3.40773010253906
2003	3.3827600479126
2004	2.86989998817444
2007	2.73951005935669
2010	2.7707200050354
2011	3.69282007217407
2012	3.668790102005
2013	2.67899990081787
2014	2.59699988365173
2015	3.33400011062622
2016	3.4349799156189
2017	3.09100008010864
2018	3.2960000038147
2019	3.49000000953674
2020	3.93615007400513
2021	3.41070008277893
2022	3.41496992111206