Year Total 1985 108 1986 22510 1987 23630 1988 26760 1989 28030 1990 26250 1991 23820 1992 22900 1993 22630 1994 21610 1995 23180 1996 22690 1997 20380 1998 20100 1999 18420 2000 15570 2001 13200 2002 11550