Year	Number of
1990	282100
1991	279900
1992	277600
1993	275100
1994	272700
1995	270100
1996	267500
1997	264900
1998	262200
1999	259400
2000	256500
2001	253600
2002	250800
2003	247900
2004	245000
2005	242100
2006	239100
2007	236000