Year	current US$
1970	10843413.6461246
1971	11799966.4911448
1972	16037080.2206081
1973	27170089.1195678
1974	27220120.4193573
1975	33772191.6725875
1976	38367286.8589333
1977	68269244.7967892
1978	66594508.9372378
1979	86797994.6535182
1980	100531409.072542
1981	62592026.9125983
1982	75429763.9839466
1983	48393874.0093511
1984	43294837.660594
1985	40889422.3417462
1986	75278980.583405
1987	89764411.9472665
1988	113579016.489752
1989	137858376.697092
1990	155737552.810141
1991	115915488.09655
1992	135406218.021604
1993	117024161.382144
1994	98792773.1086989
1995	96443792.7201382
1996	94922807.760738
1997	101919378.855142
1998	123280818.771102
1999	103681828.765123
2000	155878743.564966
2001	156190595.536065
2002	221441844.199425
2003	255622630.631104
2004	177360103.296228
2005	190263645.490025
2006	197438619.21544
2007	294317192.9539
2008	370612883.505081
2009	385296238.320205
2010	358662867.027399
2011	418873701.209042
2012	499268674.495918
2013	530226200.275405
2014	596066258.669909
2015	617338862.460362
2016	665825264.334547
2017	679131269.88063
2018	480042378.328617
2019	473390712.141025
2020	530968373.043488
2021	578298695.275389