Year	US Dollars adjusted for inflation)
1970	2584
1971	2607
1972	2633
1973	2694
1974	2769
1975	2836
1976	2919
1977	2978
1978	3054
1979	3042
1980	3272
1981	2925
1982	3026
1983	2916
1984	2922
1985	3065
1986	3144
1987	3061
1988	3082
1989	3145
1990	2764
1991	2658
1992	2530
1993	2573
1994	2335
1995	2486
1996	2676
1997	2719
1998	2851
1999	2866
2000	3071
2001	3270
2002	3329
2003	3457