2006 337 vehicles 2005 1,049 vehicles 2004 730 vehicles 2003 1,076 vehicles 2002 1,280 vehicles 2001 772 vehicles 2000 1,057 vehicles 1999 547 vehicles 1998 501 vehicles 1996 229 vehicles 1995 281 vehicles 1994 198 vehicles 1993 169 vehicles 1992 243 vehicles 1991 252 vehicles 1990 290 vehicles 1989 252 vehicles 1988 257 vehicles 1987 149 vehicles