Year	current US$
1974	312203847.6185333
1975	127981465.14848953
1976	182949042.81546238
1977	250587822.40162647
1978	254745691.89516488
1979	354094897.5326606
1980	392241886.41299385
1981	244813563.75995767
1982	166197199.86902854
1983	171130041.6098513
1984	179037345.90809423
1985	240665347.06566077
1986	317139268.2563251
1987	316699115.6234791
1988	282513375.0090904
1989	221887821.57626322
1990	763392821.7236861
1991	726853923.7609096
1992	754503894.1375221
1993	73699618.81234716
1994	414652103.0323771
1995	595046591.0426216
1996	427807157.465268
1997	450370175.71079063
1998	321180851.8871676
1999	321788923.7440296
2000	481471454.8177812
2001	444532856.1238837
2002	598955654.6818683
2003	796732085.8528057
2004	927777346.8226181
2005	605075058.1406491
2006	455318911.2107061
2007	463231087.4513428
2008	532869700.855538
2009	479929085.9805802
2010	518835388.5456164
2011	753920759.3474184
2012	649421693.0748439
2013	747791020.7585727
2014	954698908.185992
2015	963434638.3139747
2016	787115518.0426388
2017	978890612.520783
2018	1160201925.0467865
2019	1245349521.8847542
2020	1557790936.6838012