This table has the statistics of the interface (Gi, Gn, Gp)
upstream and downstream traffic per SGSN for a
configurable duration set in cGgsnThruputIntervalOne and
cGgsnThruputIntervalTwo.
Creation of row(s) will happen when there is a valid value set
to cGgsnThruputIntervalOne or cGgsnThruputIntervalTwo and
when a PATH is established.
Deletion of row(s) will happen when either the PATH gets
removed or the throughput intervals(cGgsnThruputIntervalOne,
cGgsnThruputIntervalTwo) is unset.