2001 290 vehicles 2000 601 vehicles 1999 1,186 vehicles 1998 1,906 vehicles 1997 1,805 vehicles 1996 1,428 vehicles 1995 1,329 vehicles 1994 1,929 vehicles 1993 2,038 vehicles 1992 1,977 vehicles 1991 1,690 vehicles 1990 1,364 vehicles 1989 1,474 vehicles 1988 1,003 vehicles 1987 779 vehicles 1986 592 vehicles 1985 1,334 vehicles 1984 119 vehicles