Year	Total
1990	3543000000
1991	4173000000
1992	6194000000
1993	7080000000
1994	6886000000
1995	6754000000
1996	7125000000
1997	7072000000
1998	7045000000
1999	6985000000
2000	7222000000
2001	7199000000
2002	7383000000
2003	7395000000
2004	7477000000
2005	7364000000
2006	7620000000
2007	7324000000
2008	7390000000