Year	current US$
1976	474999720.13789874
1977	638828669.6958367
1979	731247693.2837297
1980	887834307.8291438
1981	832772181.7197615
1982	683164086.5699711
1983	565884382.208994
1984	569135531.8513963
1985	546337009.2539936
1986	811593415.744133
1987	1035125208.4065027
1988	1134547903.1030598
1989	1048369323.09459
1990	1176959038.0050492
1991	1200708571.8509073
1992	1208736569.8417897
1993	1176568741.3732765
1994	1228385145.2261882
1995	1309233636.2781565
1996	1359060444.2195065
1997	1470147998.316437
1998	1587203015.1721232
1999	1477888243.4007237
2000	1329655728.7777634
2001	1535991115.1628819
2002	1960047496.854257
2003	1874826001.7421296
2004	2045686866.5439813
2005	2218334831.1822343
2006	2333600666.0563855
2007	3464682420.2369404
2008	947272375.682586
2009	843121374.6230737
2010	1074228946.485764
2011	1652582670.5102227
2012	1834594326.8551023
2013	3502700771.511434
2014	3864327239.9131846
2015	4383606857.100227
2016	6067315345.534554
2017	6419499260.767764
2018	6925644515.652874
2019	6717536446.831057
2020	4840233175.7040205
2021	5221895273.15916
2022	6485247391.069985
2023	7865433805.608572