Year	current US$
1976	174843108.485365
1977	191511994.528625
1978	217943028.82538
1979	229701997.168272
1980	247847035.965298
1981	280056690.991838
1982	284959210.994956
1983	242749704.545533
1984	300887504.707976
1985	374207129.055005
1986	322243632.772002
1987	377936282.068034
1988	440864502.848719
1989	402724877.43046
1990	302480788.740802
1991	383906952.141768
1992	442667521.231485
1993	528892093.034599
1994	481989659.840717
1995	814239487.106896
1996	842049407.354107
1997	842537209.879051
1998	864429073.647352
1999	875781553.257522
2000	1010872080.24044
2001	887823151.052246
2002	1302594435.95225
2003	1404020623.69348
2004	1733094216.38654
2005	2157912655.8034
2006	2271049286.62382
2007	2726840967.05384
2008	4027104134.77146
2009	4209897604.96782
2010	5256917746.70771
2011	5245521928.25632
2012	6415903331.98604
2013	7109167170.43898
2014	7887290992.55078
2015	8438176127.20198
2016	7124810930.49681
2017	10531942525.0503
2018	12101623065.4075
2019	12174228020.5958
2020	8738246170.2021
2021	9393328890.10015