List of reporting marks: XXXCLX - Xcel EnergyXCWZ - Union Pacific RailroadXFEZ - Florida East Coast RailwayXNWZ - Norfolk Southern RailwayXOMX - Exxon-Mobil CorporationXRFZ - CSX TransportationXSCZ - CSX TransportationXSLZ - Soo Line RailroadXTRX - XTRA, Inc.; First Union RailXTTX - Trailer Train Company