Year	US Dollars adjusted for inflation)
1970	1995
1971	1867
1972	1728
1973	1843
1974	2147
1975	1932
1976	2145
1977	2320
1978	2477
1979	2892
1980	2620
1981	2611
1982	2425
1983	2070
1984	2141
1985	2127
1986	2036
1987	2052
1988	1939
1989	2157
1990	2188
1991	2220
1992	2510
1993	2530
1994	2518
1995	2676
1996	2673
1997	2554
1998	2515
1999	2424
2000	2013
2001	1784
2002	1696
2003	1711