Year Total 1984 8565 1985 8742 1986 10020 1987 9577 1988 10550 1989 11780 1990 12580 1991 13350 1992 14960 1993 16790 1994 18710 1995 17560 1996 16080 1997 16020 1998 14960 1999 14350 2000 11270 2001 14330 2002 20390