Year	current US$
1977	9249999.98696148
1979	0
1980	22649999.9202788
1981	21490000.3448129
1982	21980000.0488758
1983	24810000.067576803
1984	23899999.575689398
1985	25659999.676048797
1986	24410000.259056702
1987	26829999.960959
1988	33679999.783635095
1989	42100000.3181398
1990	52810000.412166096
1991	56140000.1496077
1992	37739999.7208267
1993	38629999.9896437
1994	58459999.6786565
1995	76019999.3699789
1996	68840000.204742
1997	75159999.448806
1998	74250000.1229346
1999	63120000.1239777
2000	49520000.4018843
2001	75620000.1649559
2002	98239999.7003376
2003	95590000.6704032
2004	85869999.9004602
2005	83899999.84391029
2006	90589999.7055531
2007	96940000.3161281
2008	141459999.904037
2009	146929999.638349
2010	145089999.670163
2011	141179998.14637
2012	148811080.19501
2013	148850789.248943
2014	147823358.80398798
2015	139009645.12676
2016	118845194.786787
2017	102217980.98087299
2018	97787110.2020144
2019	130880466.82626
2020	154556931.063533
2021	158549123.04878202
2022	170061371.5350628