Year	current US$
1992	6346100000
1993	7713100000
1994	7316780000
1995	9880000000
1996	11168690000
1997	27333650000
1998	16468830000
1999	10566840000
2000	15082700000
2001	9353070000
2002	8508330000
2003	14385980000
2004	5295190000
2005	9489510000
2006	12371880000
2007	11327940000
2008	18882620000
2009	28676930000
2010	22370287000
2011	31231920000
2012	57429940000
2013	38467140000
2014	24323560000
2015	24645605000
2016	32437701000
2017	29682910000
2018	21887760000
2019	17081100000
2020	12285480000
2021	8909890000
2022	11891260000