Year	Number of
1980	40100
1981	42420
1982	52400
1983	56820
1984	65040
1985	71730
1986	80850
1987	85870
1988	95520
1989	80800
1990	88630
1991	60010
1992	60010
1994	99330
1995	26030
1996	41890
1997	59100
1998	69470
1999	72100
2000	91100
2001	94960
2002	110300
2003	117600
2004	123100
2005	124300
2006	122200
2007	128800