The (high 32 bits) value of
wfFrSwCctLocalSentNonDEOctets value at
wfFrSwUsageEndTimeStamp.
Note: Since wfFrSwCctLocalSentNonDEOctets
is a 32-bit COUNTER, this is really a counter
keeping track of number of times
wfFrSwCctLocalSentNonDEOctets has wrapped around.