Year	US Dollars adjusted for inflation)
1979	4809
1980	4650
1981	4214
1982	4086
1983	3853
1984	4166
1985	3821
1986	4239
1987	4291
1988	4079
1989	3997
1990	3848
1991	2984
1992	3083
1993	3239
1994	2860
1995	3402
1996	3244
1997	3098
1998	3012
1999	4493
2000	4376
2001	4545
2002	4441
2003	4324