Why does the fish and game plant rainbow trout in everything?

There are several reasons for rainbow trout being the most stocked resident fish in Idaho.  *1)  surveys show the majority of anglers that fish in Idaho prefer catching rainbow trout; 2) rainbow trout eggs are readily available for commercial/conservation, large-scale production; 3) our fish hatcheries are located on water sources that are conducive to growing coldwater fish species such as rainbow trout; and 4) we have ways of creating sterile rainbow trout in our hatchery system that won't genetically compete with wild trout species where we stock rainbow trout.       *2011 IDFG Random Angler Opinion Survey.