Year	Number of
1982	98650
1983	117600
1984	151600
1985	226900
1986	265100
1987	251600
1988	304600
1989	310600
1990	375500
1991	345000
1992	320400
1993	344200
1994	363800
1995	515800
1996	504800
1997	466400
1998	445700
1999	449500
2000	454400
2001	470200
2002	462600
2003	615900
2004	790600
2005	894400
2006	940900
2007	979500