Year	Number of
1990	10720000
1991	8716000
1992	7682000
1993	8777000
1994	7977000
1995	2438000
1996	4969000
1997	1132000
1998	30500000
1999	424000
2001	324600
2002	369400
2003	11380000
2004	11900000
2005	11440000
2006	10570000