Year	current US$
1971	3000000
1972	6179999.82833862
1973	270000.010728836
1974	1000000
1975	4880000.11444092
1976	1539999.96185303
1977	4570000.17166138
1978	14789999.961853001
1979	3049999.95231628
1980	11199999.8092651
1981	9800000.19073486
1982	4369999.88555908
1983	3220000.02861023
1984	4070000.1716613797
1985	3309999.94277954
1986	6230000.01907349
1987	2319999.9332428
1988	6630000.11444092
1989	10420000.076293899
1990	9539999.96185303
1991	14510000.2288818
1992	19850000.3814697
1993	14640000.3433228
1994	20559999.4659424
1995	11819999.6948242
1996	12229999.5422363
1997	8260000.22888184
1998	23750000
1999	16940000.5340576
2000	14619999.8855591
2001	12279999.7329712
2002	13590000.1525879
2003	10869999.8855591
2004	11829999.923706101
2005	10699999.8092651
2006	13399999.6185303
2007	20129999.1607666
2008	17879999.1607666
2009	22909999.8474121
2010	21030000.6866455
2011	32659999.847412102
2012	32619998.931884803
2013	36080001.8310547
2014	32909999.847412102
2015	37439998.626709
2016	31180000.3051758
2017	38860000.6103516
2018	44549999.237060495
2019	39169998.1689453
2020	36080001.8310547
2021	42110000.6103516
2022	40029998.779296905