OK, let me repeat
1 and 2 is available in sysstat.tables , card column. This column is updated by the runstats command and therefore this value is correct at the time of collecting stats(runstats command)
3 and 4 - if using 9.7, it is available in lastused column of syscat.tables.This time specified in the column is not guaranteed to be correct - the update to the column occurs later and not immediately following the event.If using earlier versions of db2,
afaik, there is no place where last used is stored.
I hope I have provided you with enough information to help you find the information you want.