Year	US Dollars adjusted for inflation)
1960	1099
1961	1114
1962	1062
1963	1026
1964	1068
1965	1019
1966	1056
1967	1018
1968	1119
1969	1181
1970	1279
1971	1364
1972	1514
1973	1694
1974	1716
1975	1734
1976	1863
1977	1978
1978	2067
1979	2067
1980	2083
1981	2075
1982	1960
1983	2096
1984	2246
1985	2214
1986	2317
1987	2416
1988	2611
1989	2793
1990	2917
1991	3123
1992	3313
1993	3467
1994	3576
1995	3695
1996	3907
1997	3958
1998	3604
1999	3596
2000	3772
2001	3826
2002	3976
2003	4121
2004	4064