Year	current US$
1984	7300000
1985	11500000
1986	11500000
1987	11500000
1988	11500000
1989	30100000
1990	25900000
1991	30100000
1992	30100000
1993	30100000
1994	242100000
1995	432430000
1996	3102100000
1997	14124250000
1998	9963830000
1999	4763640000
2000	8357900000
2001	3905040000
2002	3907230000
2003	3824250000
2004	1914100000
2005	4031890000
2006	5851500000
2007	8389200000.000001
2008	9357600000
2009	23624110000
2010	11838300000
2011	16912300000
2012	30347030000
2013	10075420000
2014	10077600000
2015	5805180000
2016	14598300000
2017	6515000000
2018	4953540000
2019	14946570000
2020	6242530000
2021	3170480000
2022	6127990000