Year	current US$
1974	186304792.17782506
1975	273689537.38455695
1976	259830454.55759615
1977	278757071.4110027
1978	280999549.25737405
1979	396402395.33735126
1980	574909116.7228967
1981	598762148.0083231
1982	734570857.8170816
1983	729750834.102364
1989	1051142976.9804815
1990	1311976112.9866326
1991	1487077074.4696248
1992	2004337718.3208745
1993	2125274865.3755343
1994	1978468605.0683362
1995	2642913837.1990476
1996	3102037458.4852495
1997	3040127801.2077
1998	2325523033.55278
1999	2226605158.714941
2000	2149496827.9481635
2001	2195238884.5820475
2002	2432368585.0681453
2003	2358644298.561058
2004	2502614499.34565
2005	2601045363.576118
2006	2892444174.801581
2007	3416822484.4768305
2008	3974690350.5373745
2009	3841137821.581513
2010	3832757979.595294
2011	5563182827.429242
2012	6758341089.353352
2013	7761560016.816314
2014	5854952487.6878395
2015	4872546659.383771
2016	4302691141.327993
2017	4318058847.512222
2018	5693328954.518396
2019	6810532693.064676
2020	6355257109.6823015
2021	9377937977.700666
2022	10106443642.871853
2023	9081237975.399826