Year	current US$
1970	9599999.845027924
1971	20120000.060647704
1972	30470000.475645043
1973	43669999.9570847
1974	47709998.78644938
1975	161660002.59853902
1976	79769999.03097744
1977	111989998.22139743
1978	104149997.94960022
1979	109959999.27259979
1980	104190001.01089488
1981	128629997.4322319
1982	169989996.31404877
1983	180419999.5845557
1984	162370000.3921986
1985	146329996.6417253
1986	136369995.60333794
1987	169239995.72731552
1988	189639998.68370584
1989	186830000.75817105
1990	183829998.73161322
1991	204290000.08106232
1992	246749999.28474423
1993	119529999.49455266
1994	169460000.5149841
1995	112630002.49862674
1996	38259999.781846985
1997	111880001.42574306
1998	48120000.392198615
1999	70639999.2704392
2000	55550000.429153465
2001	60920000.910759
2002	55279999.971389756
2003	43190001.01089477
2004	40329999.44686889
2005	54920000.19550331
2006	36710000.41067606
2007	42280000.597238496
2008	49390000.22411347
2009	57299999.59468837
2010	55099998.83174898
2011	56490001.20162961
2012	45630348.85376695
2013	32077974.658459447
2014	16784099.62356091
2015	19719580.605626103
2016	17467469.841241844
2017	22656499.92972609
2018	19653837.94717487
2019	15757271.230220793
2020	19896104.41029071
2021	22020899.824798103
2022	27858436.46526336