Year	Total
1984	4215
1985	23630
1986	25840
1987	28250
1988	32900
1989	37400
1990	43570
1991	43540
1992	48350
1993	51490
1994	59340
1995	66130
1996	78490
1997	111200
1998	147000
1999	162100
2000	201000
2001	233200
2002	254000