Survival video games at West Bend, Wisconsin, to borrow free
E10+
E
M
M
M
T
T
T
T
T
M
E
—
T
M
M
E
M
E10+
T
E10+
E
T
Copies per library (table)
Each change is stamped with the snapshot that saw it; it happened since the snapshot before (hourly for copies already moving, every 4 hours for everything else).