Year	current US$
1970	18970488.1214285
1971	13789294.9116239
1972	12495122.3753962
1973	40163168.3962175
1974	74576097.0044968
1975	28782121.5454643
1976	34453552.2086888
1977	24081476.8878583
1978	18962031.7123677
1979	43137797.1750447
1980	71213795.6306685
1981	43350676.8169185
1982	24546460.756689
1983	24122560.2749424
1984	33072266.2732462
1985	33832572.9789672
1986	8222340.41506326
1987	21897015.9396831
1988	427981565.550945
1989	336276844.554941
1990	121716585.080262
1991	13401571.5823755
1992	5269206.4862425
1993	2955662.87457225
1994	4589668.50742772
1995	7537002.80726239
1996	2817158.06515572
1997	11040998.1419512
1998	5467919.86630211
1999	5479602.3598958
2000	5780786.98285004
2001	5483172.61841964
2002	2692776.26537279
2003	10896859.4208507
2004	12573077.3624708
2005	33610339.9582223
2006	123461988.101397
2007	333742694.833216
2008	76313290.4069225
2009	59980588.9533338
2010	119095569.261001
2011	124532552.309972
2012	98355837.1471962
2013	39613446.4131245
2014	75557495.3826444
2015	81463005.5803412
2016	124135467.660937
2017	215663579.522093
2018	72007108.7471276
2019	73050216.4100961
2020	71733478.8593119
2021	262772613.179098