Year	US Dollars adjusted for inflation)
1970	1818
1971	1808
1972	1803
1973	2043
1974	2667
1975	2465
1976	2438
1977	2341
1978	2667
1979	2672
1980	2298
1981	2325
1982	2499
1983	3099
1984	3171
1985	2950
1986	2990
1987	2636
1988	2640
1989	2659
1990	2679
1991	2942
1992	3109
1993	3147
1994	3114
1995	3164
1996	3066
1997	3217
1998	3377
1999	3111
2000	3235
2001	2752
2002	2586
2003	2873