Year	Number of
1990	1439000
1991	1373000
1992	1447000
1993	1697000
1994	1673000
1995	1928000
1996	2190000
1997	2228000
1998	1745000
1999	2895000
2000	3350000
2001	3045000
2002	3141000
2003	3553000
2004	3416000
2005	3453000
2006	3511000