Year	current US$
1968	505355555.5555556
1969	526844444.4444445
1970	612866666.6666667
1971	637795454.5454545
1972	593818181.8181818
1973	607627906.9767442
1974	765139534.8837209
1975	1035209302.3255814
1976	1057697674.4186046
1977	1170232558.139535
1978	1035209302.3255814
1979	1462790697.6744187
1980	1800348837.2093024
1981	1890372093.0232558
1982	2182930232.5581393
1983	4568395348.83721
1984	2590418052.256531
1985	2839320000
1986	703558762.8865982
1987	2182434482.7586207
1988	1264068965.5172412
1989	1366498198.4146037
1990	687469699.6623418
1991	1025826660.8007039
1992	1271065561.7902563
1993	1462530410.0487568
1994	2381685521.885522
1995	4292901748.187307
1996	4021758447.1603165
1997	7559357391.4152355
1998	7915518353.881321
1999	7769213752.115234
2000	7708608755.293354
2001	8457974873.079875
2002	5802051856.318374
2003	4449442437.079492
2004	8875054811.576931
2005	11852883359.2535
2006	14799664182.580345
2007	17394947834.18724
2008	20318195001.39886
2009	25105622027.417698
2010	28247997757.24063
2011	24427020492.854313
2012	31684770708.507217
2013	32172466382.528828
2014	52614641163.55304