A conceptual row in the csbSIPMthdHistoryStatsTable. The
entries in this table are updated as interval completes in
the csbSIPMthdCurrentStatsTable table and the data is
moved from that table to this one.
This table is indexed on csbSIPMthdHistoryStatsAdjName,
csbSIPMthdHistoryStatsMethod and
csbSIPMthdHistoryStatsInterval. The other indices of this
table are csbCallStatsInstanceIndex defined in
csbCallStatsInstanceTable and csbCallStatsServiceIndex
defined in csbCallStatsTable.