Year	current US$
1994	3500000
1995	152800000
1996	58000000
1997	99100000
1998	433200000
1999	297000000
2000	711280000
2001	26930000
2002	2460000
2003	48200000
2004	45730000
2005	3164000
2007	140570000
2008	828400000
2009	14800000
2010	230400000
2011	127500000
2012	4572800000
2013	2947100000
2014	1786800000
2015	1726700000
2016	222700000
2017	218600000
2018	1400000
2019	313980000
2020	1329380000
2021	5614000000
2022	565200000