Year	current US$
1976	7300000.19073486
1978	150000.005960464
1979	-400000.00596046395
1980	10350000.3814697
1981	4730000.01907349
1982	6219999.79019165
1983	6239999.771118159
1984	7090000.15258789
1985	7000000
1986	12470000.2670288
1987	12960000.038146999
1988	10079999.923706101
1989	11369999.8855591
1990	15899999.6185303
1991	13260000.2288818
1992	12760000.2288818
1993	11770000.4577637
1994	11680000.3051758
1995	12489999.7711182
1996	13069999.6948242
1997	11130000.1144409
1998	12000000
1999	12750000
2000	13229999.5422363
2001	14630000.1144409
2002	13479999.5422363
2003	19959999.084472697
2004	23709999.084472697
2005	25959999.084472697
2006	27379999.1607666
2007	31680000.3051758
2008	26670000.0762939
2009	25700000.762939498
2010	23049999.237060502
2011	22200000.762939498
2012	26120000.8392334
2013	20479999.5422363
2014	33119998.931884803
2015	12500000
2016	15420000.076293899
2017	27950000.762939498
2018	73910003.6621094
2019	60279998.779296905
2020	69260002.1362305
2021	63319999.6948242
2022	61139999.3896484