1998 207 vehicles 1997 262 vehicles 1996 694 vehicles 1995 1,194 vehicles 1994 1,865 vehicles 1993 2,221 vehicles 1992 374 vehicles 1991 496 vehicles 1990 1,285 vehicles 1989 1,404 vehicles 1988 1,250 vehicles 1987 1,042 vehicles 1986 615 vehicles