Year	current US$
1990	5380733604.777224
1991	4194807785.472059
1992	4117519614.4242826
1993	4991622038.965733
1994	4672357966.288523
1995	3106099558.7655
1996	4322573260.07326
1997	3795029357.774277
1998	3259377125.332033
1999	3410872100.9204183
2000	4531521505.691247
2001	3665727922.9965754
2002	2768503937.007874
2003	5084761328.125
2004	3855087692.307692
2005	4504646338.807003
2006	12648792757.458288
2007	13000883066.895287
2008	18785725610.962093
2009	15821190330.697054
2010	14926005830.48953
2011	4066651853.691372
2012	14083588288.445381
2013	16340277362.757648
2014	15045166543.277988
2015	8468082333.606041
2016	6888099490.135353
2017	9205779799.40021
2018	11605482037.294674
2019	3806008097.189155
2020	7092075133.923395
2021	12478777385.82433
2022	12860160663.179708
2023	7432057126.674386