Year	current US$
1970	0
1971	0
1972	9500000
1973	11309999.465942401
1974	15970000.2670288
1975	38150001.5258789
1976	29239999.7711182
1977	24440000.5340576
1978	26059999.4659424
1979	27250000
1980	24989999.7711182
1981	24090000.1525879
1982	20399999.6185303
1983	20409999.8474121
1984	20880001.068115197
1985	19370000.8392334
1986	19159999.8474121
1987	30139999.3896484
1988	23829999.9237061
1989	24930000.3051758
1990	37950000.762939505
1991	27289999.0081787
1992	33740001.6784668
1993	38799999.237060495
1994	34920001.9836426
1995	50580001.8310547
1996	54190002.4414063
1997	61770000.4577637
1998	52630001.0681152
1999	60369998.9318848
2000	49500000
2001	50040000.9155273
2002	51290000.9155273
2003	72330001.8310547
2004	81919998.1689453
2005	96229995.7275391
2006	111129997.253418
2007	122919998.168945
2008	134910003.66210902
2009	128240005.493164
2010	148070007.32421902
2011	170029998.779297
2012	182619995.117188
2013	174930007.93457
2014	211389999.38964802
2015	195360000.61035198
2016	191630004.882813
2017	187509994.506836
2018	228490005.493164
2019	202319992.06543
2020	225000000
2021	305519989.013672
2022	155879998.5386431