Year	current US$
1974	20315429.69
1975	37328739.17
1976	34735359.19
1977	26009574.89
1978	27386940
1979	26325582.5
1980	31238351.82
1981	23331947.33
1982	20100885.39
1983	12196561.81
1984	10647845.27
1985	14430678.37
1986	16308345.790000001
1987	11905949.59
1988	13844011.31
1989	13458584.79
1990	17501628.5772927
1991	9992590.0095894
1992	9436864.0354799
1993	6698775.85357793
1994	8447069.83775007
1995	11076905.7650312
1996	13210213.1075354
1997	15125069.0981579
1998	13000334.7791422
1999	11213004.9214047
2000	11903986.429219
2001	11415636.2512472
2002	4714538.88561741
2003	17924587.4
2004	9001433.90000002
2005	23162247.7263305
2006	27214040.8760387
2007	38241872.3026728
2008	40562028.7821412
2009	49537321.829382
2010	58909226.1842598
2011	54214198.6567716
2012	63112378.1222045
2013	55195669.6685189
2014	49749228.9614248
2015	57976274.8288676
2016	47656921.8462246
2017	63489593.2209007
2018	74265373.8404899
2019	63243733.9197814
2020	42944963.2391741
2021	54091502.4935772
2022	99975405.2413762