Year Total 1990 210000 1991 260000 1992 333000 1993 410000 1994 530000 1995 660000 1996 810000 1997 970000 1998 1100000 1999 1260000 2000 1480000 2001 1700000 2002 2200000 2003 2847000 2004 3684000 2005 4521000 2006 6300000