There are two major polls that have been in existence for the last half
century or more.  They are the Associated Press Poll and the Coaches Poll.I dont have every year online as of yet but I am getting there.

The Associated Press Poll has been active since 1936.  The
AP took their final poll prior to bowl games from 1936 - 1964 and in 1966 and 1967.They took their final poll after the bowl games in 1965 and from 1968 - Current.

The Coaches Poll has been active since 1950.  The Coaches Poll took their final poll prior to the bowl games from 1950 - 1973 and starting in 1974 took their final poll after bowl games. The Coaches Poll has utilized different
sources to present their poll over the years and are as follows: