Year Total 1990 7400000 1991 8100000 1992 8600000 1993 9700000 1994 11500000 1995 15100000 1996 20400000 1997 25500000 1998 30000000 1999 36300000 2000 40000000 2001 45600000 2002 48700000 2003 52010000