Year	current US$
1995	17201000000
1996	18619000000
1997	19676000000
1998	20539000000
1999	19587000000
2000	18170000000
2001	17002000000
2002	19652000000
2003	23748000000
2004	24076000000
2005	26764000000
2006	27449000000
2007	32748000000
2015	30312000000
2016	30584000000
2017	34819000000
2018	37644000000
2019	37908000000
2020	12965000000