Year	current US$
1980	162000000
1981	238000000
1982	236000000
1983	69000000
1984	135000000
1985	168800000
1986	203200000
1987	231360000
1988	248200000
1989	541300000
1990	965000000
1991	1261690000
1992	1518220000
1993	1303590000
1994	1304510000
1995	1348160000
1996	1251430000
1997	1234400000
1998	1375680000
1999	1363280000
2000	1194820000
2001	1737040000
2002	1712210000
2003	1961260000
2004	2436990000
2005	3018300000
2006	3813670000
2007	5139800000
2008	6866830000
2009	6584110000
2010	5949460000
2011	4173109999.9999995
2012	2037330000
2013	2348090000
2014	1876830000
2015	1396740000
2016	4223670000
2017	2560300000
2018	2589590000
2019	2708700000
2020	2739270000
2021	3358480000
2022	4042880000