Year	US Dollars adjusted for inflation)
1970	984.2
1971	1008
1972	1014
1973	1103
1974	1080
1975	1083
1976	1165
1977	1176
1978	1138
1979	1094
1980	1048
1981	1064
1982	1065
1983	983.4
1984	939.9
1985	966.5
1986	997
1987	1033
1988	1026
1989	1030
1990	1048
1991	1087
1992	1103
1993	1113
1994	1121
1995	1143
1996	1156
1997	1191
1998	1103
1999	979.4
2000	1048
2001	1095
2002	1123
2003	1176