Year	current US$
1970	295199648.6402811
1971	345809364.3531588
1972	417093294.0383126
1973	541929848.0293798
1974	626525364.9276689
1975	680911828.7942908
1976	656412226.1953964
1977	725310261.0976988
1978	951668789.3692294
1979	1165866682.4798117
1980	1539176983.2324336
1981	1439994019.7853472
1982	1381787421.3682663
1983	1331767315.1691992
1984	1235157512.4998837
1985	1288809993.249885
1998	6035110963.895329
1999	6206115515.288789
2000	6243001967.014676
2001	6080322441.341586
2002	6482314148.681055
2003	7173877551.020408
2004	8288172830.465031
2005	8512727272.727272
2006	9205151793.928244
2007	10888355342.136854