Year	current US$
1970	15890000.045299545
1971	19889999.98569488
1972	19479999.95946884
1973	17500000.119209293
1974	16040000.14066696
1975	26109999.77588654
1976	22720000.3862381
1977	16199999.97317791
1978	18810000.250116
1979	25569999.694824222
1980	27389999.38964844
1981	25879999.339580547
1982	18569999.754428867
1983	12549999.83310699
1984	15080000.042915333
1985	16160000.205039978
1986	18979999.8998642
1987	20110000.01430511
1988	27519999.742507942
1989	28659999.847412124
1990	17800000.190734867
1991	15110000.446438791
1992	9710000.125691285
1993	7400000.073015694
1994	12520000.115036972
1995	6269999.932497734
1996	6600000.008940691
1997	6929999.971762294
1998	8379999.8313188655
1999	6469999.983906748
2000	4580000.020563609
2001	5840000.089257953
2002	-1099999.9288469534
2003	5120000.060647727
2004	5029999.956488608
2005	4049999.952316287
2006	4109999.943524606
2007	4159999.966621391
2008	4000000.029802331
2009	4469999.969005587
2010	4000000.029802325
2011	3409999.9945610734
2012	3043125.6480514957
2013	3031150.0132083837
2014	2684856.146574022
2015	6039334.774017328
2016	1935747.3850250249
2017	1337374.9703168871
2018	941978.588700295
2019	986680.0159215932
2020	1078936.994075776
2021	2252681.3745498657
2022	1857655.942440033