According to Tor Relay Guide:
ORPort 443 is recommended because it is often one of the few open ports on the public WIFI networks... Port 9001 is another commonly used ORPort.
I am running an exit relay.
If I am unable to use both port 443 and 9001, will other ports decrease the amount of traffic to my relay? Let's say I am also using a port that's commonly open on public networks.