Year	current US$
1972	2130000.1144409203
1973	5429999.82833862
1974	9750000
1975	9380000.11444092
1976	6190000.05722046
1977	9600000.38146973
1978	23579999.9237061
1979	20329999.9237061
1980	28879999.1607666
1981	21030000.6866455
1982	24590000.1525879
1983	20569999.6948242
1984	22280000.6866455
1985	40610000.6103516
1986	30040000.915527303
1987	27489999.7711182
1988	33790000.9155273
1989	38729999.5422363
1990	54099998.4741211
1991	57479999.5422363
1992	37119998.9318848
1993	28850000.3814697
1994	33330001.831054702
1995	32630001.068115197
1996	36900001.5258789
1997	39009998.3215332
1998	46080001.8310547
1999	42000000
2000	33669998.1689453
2001	41810001.373291
2002	37330001.8310547
2003	45270000.4577637
2004	45669998.1689453
2005	50360000.6103516
2006	44049999.237060495
2007	41959999.0844727
2008	47200000.762939505
2009	47409999.8474121
2010	84099998.4741211
2011	58360000.6103516
2012	61090000.1525879
2013	32319999.694824196
2014	35130001.0681152
2015	10270000.4577637
2016	24500000
2017	32880001.068115197
2018	30780000.6866455
2019	27799999.237060502
2020	15310000.4196167
2021	21989999.7711182
2022	15060000.4196167