This read-only Gauge32, in units of 0.01 percent, from 1 to 10000, represents the ratio of cumulative Codeword Errored Seconds to Link Admin Up seconds, expressed as a percentage. An admin watches this as a measure of how often the link experiences at least some correctable codeword errors, distinct from the more serious severely-errored-second percentage. For example, a rising cwrPctErroredSeconds with a stable cwrPctSeverelyErroredSeconds would suggest a mild but growing level of interference rather than a serious link fault.