Year	current US$
1977	3239999.9815970613
1980	7480000.104755164
1981	4739999.985322356
1982	5589999.999850992
1983	6639999.9670684375
1984	5779999.924823636
1985	6249999.923631556
1986	5190000.06467104
1987	5409999.912604695
1988	6600000.072270643
1989	8470000.125467772
1990	8720000.047236681
1991	9839999.958872786
1992	6680000.020191077
1993	6410000.013187528
1994	19499999.8882413
1995	19669999.79317189
1996	18229999.84212219
1997	15110000.208020208
1998	15100000.236183414
1999	17090000.167489056
2000	10400000.065565106
2001	16760000.10222197
2002	23209999.86305834
2003	20629999.93003904
2004	25380000.114440914
2005	27810000.18119812
2006	28269999.861717235
2007	28779999.971389778
2008	38790000.55789947
2009	36000000.05960466
2010	40689999.81880187
2011	37279999.97138976
2012	34096057.76751413
2013	33462584.40124802
2014	34541017.53234864
2015	33993080.97362518
2016	27559657.752513885
2017	22593189.954757698
2018	21509890.079498284
2019	31965505.42116165
2020	32454060.01806258
2021	33192141.89052581
2022	37927410.12573242