Year	current US$
1977	13400845.8001786
1978	25600149.206519
1979	34766517.0710636
1980	31769656.0771818
1981	43672556.7707468
1982	27853857.9058803
1983	28771752.6307773
1984	27027409.48189
1985	25943858.1178157
1986	20095930.3081505
1987	28387193.1653418
1988	38457021.025449
1989	30512506.8361725
1990	36645048.1241094
1991	38525851.1136379
1992	28501845.7165303
1993	29958355.8412169
1994	26074798.5012142
1995	24162931.3066335
1996	36646387.4021782
1997	38811919.7223333
1998	31522946.5726445
1999	49237380.8939102
2000	34289495.1089339
2001	43641682.6374597
2002	49414517.2499161
2003	49551923.0587031
2004	52386831.11639734
2005	64956182.960556135
2006	62148507.2970735
2007	69933515.53150062
2008	71588248.55004555
2009	74890591.61048877
2010	75398405.79923981
2011	80935242.13631302
2012	99869060.4733633
2013	106015890.17190742
2014	103798680.4602745
2015	110243841.41085733
2016	108921290.66949542
2017	193538780.1327602
2018	199115525.7730011
2019	301271800.4448839
2020	376713248.50124717
2021	389975998.1049426
2022	391580567.5751685