Year	current US$
1984	69300000
1986	4011500000
1989	572700000
1992	2066900000
1993	6140100000
1994	4718300000
1995	3440700000
1996	5006400000
1997	26811750000
1998	14614730000
1999	9105440000
2000	8107800000
2001	9059070000
2002	7024950000
2003	10757720000
2004	2742590000
2005	8717610000
2006	7530880000
2007	10955500000
2008	12163920000
2009	25660710000
2010	19420897000
2011	30660420000
2012	43722130000
2013	18155650000
2014	21207385000
2015	16267105000
2016	19278511000
2017	14756740000
2018	11621130000
2019	13077140000
2020	11716060000
2021	10342550000
2022	14402210000