Year	current US$
1992	9000000000
1993	19000000000
1994	16871428571.42857
1995	14583429228.998848
1996	15358230769.23077
1997	14726733436.05547
1998	15894645566.876219
1999	12363249097.472923
2000	12964488509.593931
2001	12717805755.395681
2002	14988582404.574184
2003	18442915852.13063
2004	23835093923.87953
2005	30582778505.167564
2006	38021598836.12489
2007	47279691344.2183
2008	64472477064.220184
2009	55540036877.24888
2010	64284491238.90805
2011	61374192653.52399
2012	63526526646.59526
2013	78159086942.07803
2014	79934664175.81989
2015	54667245175.96708
2016	46120178149.67407
2017	53707366501.375015
2018	58453343331.98535
2019	64381917244.76201
2020	59318938749.577286
2021	64147242163.72714
2022	68063249685.84593
2023	69622691073.5365