1994 158 vehicles 1993 135 vehicles 1992 141 vehicles 1991 185 vehicles 1990 252 vehicles 1989 241 vehicles 1988 224 vehicles 1987 280 vehicles 1986 393 vehicles 1985 410 vehicles 1984 405 vehicles 1983 281 vehicles 1982 151 vehicles 1981 112 vehicles 1980 204 vehicles