Year	current US$
1968	2970000.02861023
1969	3130000.1144409203
1970	3470000.02861023
1971	3950000.04768372
1972	4369999.88555908
1973	5219999.79019165
1974	5369999.88555908
1975	8640000.34332275
1976	7059999.94277954
1977	6730000.01907349
1978	8850000.38146973
1979	10869999.8855591
1980	11569999.6948242
1981	9699999.80926514
1982	8810000.4196167
1983	8800000.19073486
1984	6860000.1335144
1985	5860000.1335144
1986	6920000.07629395
1987	7619999.88555908
1988	12699999.8092651
1989	13239999.7711182
1990	5119999.88555908
1991	3720000.02861023
1992	3019999.98092651
1993	2740000.00953674
1994	629999.995231628
1995	2490000.00953674
1996	2970000.02861023
1997	1870000.00476837
1998	899999.976158142
1999	300000.011920929
2000	-389999.98569488496
2001	319999.99284744303
2002	400000.00596046395
2003	990000.009536743
2004	1110000.01430511
2005	670000.016689301
2006	959999.978542328
2007	370000.00476837205
2008	500000
2009	920000.016689301
2010	1379999.99523163
2011	959999.978542328
2012	953420.2814102169
2013	937382.996082306
2014	444284.945726395
2015	429040.61079025303
2016	184919.998049736
2017	150000.005960464
2018	149999.991059303
2019	359479.993581772
2020	188028.529286385
2021	311390.280723572
2022	329765.349626541