Year	current US$
1971	2579999.92370605
1972	6469999.79019165
1973	1899999.97615814
1974	12279999.7329712
1975	10079999.923706101
1976	5230000.01907349
1977	17120000.8392334
1978	15500000
1979	23700000.762939498
1980	23430000.3051758
1981	18209999.084472697
1982	28829999.9237061
1983	25559999.4659424
1984	21889999.3896484
1985	22399999.6185303
1986	43040000.9155273
1987	33150001.5258789
1988	36189998.626709
1989	33599998.4741211
1990	43919998.1689453
1991	42150001.5258789
1992	37889999.3896484
1993	33319999.694824196
1994	36720001.220703095
1995	41200000.762939505
1996	39610000.6103516
1997	32360000.6103516
1998	29870000.8392334
1999	34180000.3051758
2000	18379999.1607666
2001	20579999.9237061
2002	16610000.610351602
2003	12149999.6185303
2004	23940000.5340576
2005	32909999.847412102
2006	21409999.8474121
2007	39830001.8310547
2008	23200000.762939498
2009	14640000.3433228
2010	16920000.0762939
2011	16979999.5422363
2012	16569999.6948242
2013	12539999.961853001
2014	9229999.54223633
2015	4250000
2016	2700000.04768372
2017	12829999.923706101
2018	14569999.6948242
2019	14229999.5422363
2020	14949999.8092651
2021	17860000.6103516
2022	14770000.4577637