Year	US Dollars
1960	138492285.81085
1961	97661491.08197
1962	56313364.56547
1963	54798030.1038
1964	62176888.45084
1965	72787327.78688
1966	85607593.30467
1967	140496501.13541
1968	177191068.41166
1969	261186666.39964
1970	293705768.45502
1971	171061163.84647
1972	247951333.51664
1973	516703167.04616
1974	920650269.26263
1975	381504990.67676
1976	453345559.03866
1977	435568711.3112
1978	411063276.54669
1979	652286323.61035
1980	429340046.90302
1981	249150152.10778
1982	289890605.68603
1983	367326706.1144
1984	465885716.28037
1985	653328419.05021
1986	907161730.1788
1987	752713344.1383
1988	1008775534.83269
1989	1426920147.42015
1990	1684423708.35345
1991	1675709155.34554
1992	2513737766.62484
1993	2847285214.55224
1994	3557284663.61225
1995	4390057471.26437
1996	4925081433.22476
1997	4165751014.88498
1998	3934106468.10402
1999	4990254634.56211
2000	5319886677.7225
2001	5006352572.70693
2002	5924409937.8882
2003	7004909706.54628
2004	8623829153.21579
2005	9553405049.12324
2006	13528263705.934
2007	16931068984.3964
2008	17124593525.7068
2009	16523955265.3515
2010	17498805819.6804
2011	19519329190.3433
2012	17585240293.836
2013	19765992845.6118
2014	22663584179.1399
2015	20360237940.2775
2016	20582202421.9193
2017	22494691245.9511