Case File Timeline

A list of the order (or assumed order) of The Case Files. Should help with speculation and research purposes.
==The Timeline==
06/24/1981 - Case File One occurs. Ca3e F1le ! occurs on Earth-A.
04/12/1984 - Case File Three occurs.
08/25/1986 - Case File Two occurs.
Some time in the late 80's or early 90's - Case File Four occurs.
Some time after Case File Four happens (Most likely early 90's) - Case File Nine occurs.
08/24/1990 - Case File Five occurs.
09/24/1995 - Case File Eight occurs.
09/05/2000 - Case File Ten occurs.
03/18/2007 - Case File Six occurs.
11/03/2009 - Case File Seven occurs.
Unknown - Case File Letter T.