Year	current US$
1977	1951461239.0327866
1978	1593177493.9740882
1979	2315701518.050879
1980	2523614972.222989
1981	2298489032.7151346
1982	2846050012.3043637
1983	2450476874.1745
1984	2746226930.8420086
1985	2321770028.923503
1986	1734773742.7484188
1987	533491380.19551855
1988	273938966.32923603
1989	797684109.5887897
1990	1016219666.9591836
1991	324876400
1992	656657071.4634627
1993	1078299162.5235097
1994	1852983286
1995	2340976934.1317353
1996	2069751027.9441118
1997	1695667990.2723737
1998	2119890865.3846154
1999	1886161507.7519379
2000	3339322796.734352
2001	4221589237.4818196
2002	4552098820.658805
2003	4554296281.2436495
2004	4907693069.306931
2005	5479180076.628352
2006	6795361681.329424
2007	7084362538.704979
2008	7180786846.535249
2009	6598852456.2933445
2010	9725280977.302794