Year	current US$
1984	62000000
1986	4000000000
1989	542600000
1992	3528000000
1993	5577600000
1994	6583200000
1995	8765370000
1996	10870900000
1997	13261935000
1998	5190000000
1999	5095300000
2000	3476300000
2001	4439230000
2002	3461330000
2003	9760150000
2004	3105600000
2005	6406720000
2006	4531780000
2007	5742630000
2008	8811870000
2009	8133080000
2010	11676631000
2011	8235670000
2012	16909370000
2013	10001990000
2014	11224420000
2015	12860915000
2016	14717371000
2017	20020140000
2018	9646910000
2019	5582130000
2020	3939500000
2021	7717220000
2022	5096910000