Year	current US$
1984	69300000
1986	4011500000
1989	572700000
1992	3266900000
1993	6937400000
1994	6594400000
1995	5400600000
1996	12127172100
1997	31831400700
1998	16607730000
1999	10539240000
2000	10596600000
2001	10661270000
2002	7393810000
2003	12845980000
2004	4780290000
2005	10391760000
2006	8910180000
2007	28503600000
2008	27560390000
2009	32267230000
2010	21180717000
2011	32125790000
2012	44909927000
2013	20722620000
2014	23516785000
2015	16749105000
2016	21478511000
2017	15492140000
2018	11926050000
2019	21728540000
2020	12058850000
2021	10842760000
2022	15614710000