This read-only INTEGER (0-99) expresses the ratio of transmitted bits per second to the port's line speed during a sample interval, in hundredths, so 75 means the port was running at 75% of its outbound capacity. Network staff watch this to catch a port that is saturating its uplink on the transmit side, which can indicate a server dumping too much traffic outward. A value pinned near 99 on a core uplink port, for example, signals it's time to investigate what's flooding outbound traffic or to plan a faster link.