Year	US Dollars adjusted for inflation)
1960	955.6
1961	948.9
1962	959.3
1963	1010
1964	1035
1965	1049
1966	1097
1967	1163
1968	1192
1969	1219
1970	1213
1971	1226
1972	1244
1973	1435
1974	1552
1975	2051
1976	2499
1977	2735
1978	2538
1979	2170
1980	1969
1981	1886
1982	1887
1983	1795
1984	1742
1985	1723
1986	1581
1987	1447
1988	1569
1989	1490
1990	1603
1991	1567
1992	1826
1993	1558
1994	936.6
1995	1032
1996	1626
1997	3679
1998	4473
1999	5322
2000	6495
2001	9088
2002	13300
2003	11600