Year	US Dollars adjusted for inflation)
1990	3902
1991	2120
1992	1436
1993	1871
1994	2347
1995	2738
1996	2658
1997	2403
1998	2669
1999	3256
2000	3797
2001	4058
2002	4134
2003	4160
2004	4499