1998 388 vehicles 1997 1,189 vehicles 1996 605 vehicles 1995 161 vehicles 1994 513 vehicles 1993 548 vehicles 1992 344 vehicles 1991 237 vehicles 1990 288 vehicles 1989 334 vehicles 1988 334 vehicles 1987 232 vehicles 1986 232 vehicles 1985 301 vehicles 1984 260 vehicles 1983 243 vehicles 1982 111 vehicles