2002 106 vehicles 2001 110 vehicles 2000 103 vehicles 1999 123 vehicles 1998 143 vehicles 1997 152 vehicles 1996 158 vehicles 1995 252 vehicles 1994 183 vehicles 1993 220 vehicles 1992 305 vehicles 1991 379 vehicles 1990 460 vehicles 1989 514 vehicles 1988 571 vehicles 1987 503 vehicles 1986 497 vehicles 1985 495 vehicles 1984 479 vehicles 1983 394 vehicles 1982 424 vehicles 1981 449 vehicles 1980 617 vehicles