Year	US Dollars adjusted for inflation)
1990	26380000000
1991	23460000000
1992	17510000000
1993	13170000000
1994	13160000000
1995	14230000000
1996	15480000000
1997	16670000000
1998	15260000000
1999	11790000000
2000	12470000000
2001	15680000000
2002	15860000000
2003	14940000000
2004	14810000000
2005	15410000000
2006	15860000000
2007	16690000000
2008	17570000000