A read-only CwrPercentageValue, in units of 0.00001 percent, giving the ratio of cumulative Codeword Severely Errored Seconds to Link Admin Up seconds, expressed as a percentage. This normalized SES rate is often the specific figure quoted against an SLA's severe-error-second commitment, since raw counts alone do not account for how long the link has actually been in service. For example, an SLA that guarantees fewer than 0.01 percent severely errored seconds could be checked directly against p2mpSuPctSevErroredSeconds without needing to separately track total uptime.