Year	US Dollars adjusted for inflation)
1970	2003
1971	2099
1972	1898
1973	2138
1974	2142
1975	2223
1976	2827
1977	2756
1978	3285
1979	3656
1980	3386
1981	2033
1982	2116
1983	2812
1984	2622
1985	2380
1986	2628
1987	3026
1988	3003
1989	2713
1990	2538
1991	929.8
1992	1148
1993	1652
1994	1656
1995	1343
1996	1975
1997	1340
1998	2130
1999	2643
2000	2445
2001	2469
2002	2275
2003	1230