Year	Total
1990	4466000000
1991	4462000000
1992	4049000000
1993	4147000000
1994	4210000000
1995	4622000000
1996	4899000000
1997	5190000000
1998	5268000000
1999	5743000000
2000	5730000000
2001	5560000000
2002	5955000000
2003	5695000000
2004	6073000000
2005	6334000000
2006	6521000000
2007	6393000000
2008	6712000000