Year	current US$
1977	22830000.0205636
1979	0
1980	43420000.344514795
1981	31789999.909699
1982	37190000.4260242
1983	43289999.9171495
1984	49910000.9296089
1985	46669999.9682605
1986	34289999.645203404
1987	32319999.651983403
1988	40670000.3929436
1989	51989999.8642504
1990	66799999.97094269
1991	57530000.1986325
1992	52819999.5514005
1993	54070000.4007667
1994	92729998.8344312
1995	105429999.887943
1996	108020000.23238401
1997	94830000.9816885
1998	98680000.26792291
1999	84550000.29690559
2000	64900000.3822148
2001	103680001.063272
2002	115389999.696985
2003	109259999.84517701
2004	100600000.053644
2005	105429999.671876
2006	108809999.674559
2007	110229999.661446
2008	132540000.289679
2009	133360000.610352
2010	146889999.940991
2011	140630000.293255
2012	137349644.184113
2013	141503034.11483797
2014	135847929.060459
2015	123383227.884769
2016	100343585.13355301
2017	78510506.6895485
2018	80100550.0555038
2019	114774868.905544
2020	123402990.341187
2021	123913841.42637299
2022	138662440.29998782