OutBoxTrashUserIDBytesInUseInBoxfidBytesDateTime
1292990User4845769351466(e70)224665604/29/9908:19
11888User5984181704(grl)75571204/29/9901:06
1179User-2831900(bjx)11673604/29/9907:06
130User---1419724351339(adx)258560004/29/9908:24
5137User3220755138(dwy)32563204/29/9908:21
Created 99/4/24-11:39 by Stats.bat from FileName.log

UserID = The User ID of course!
BytesInUse = Bytes in use by user's mail

If this column just has "BiU", then it's generated from a Statistics run
InBox = Number of items received (includes calendar, etc)
OutBox = Number of items sent
Trash = Number of items not yet deleted from Trash
fid = GroupWise File Id - or how GroupWise identifies a UserID
Bytes = Size of userFID.db
Date = Last modification of userFID.db
Time = Last modification of userFID.db
Bold the number in the left column if it is > 100