Year	current US$
1992	6411200000
1994	10689880000
1995	15530400000
1996	17685190000
1997	35522950000
1998	22763930000
1999	14314590000
2000	18744500000
2001	12905870000
2002	11282180000
2003	16814700000
2004	7932760000
2005	14189620000
2006	20269060000
2007	23931880000
2008	34265050000
2009	55889360000
2010	62325227000
2011	58392617000
2012	82868690000
2013	47365300000
2014	37882495000
2015	37394425000
2016	41056151000
2017	50012720000
2018	31813780000
2019	27384720000
2020	27524720000
2021	19485030000
2022	23854890000