Year	Number of
1990	662600
1991	581200
1992	420100
1993	877700
1994	324200
1995	761800
1996	1696000
1997	1849000
1998	1720000
1999	1804000
2000	1534000
2001	680900
2002	1348000
2003	1821000
2004	1815000
2005	1497000
2006	1536000