Thanks knowbetter. I did some research and I came up with the following.
The History and Development
of the FM Spectrum:
In the 1940's Congress watched with concern as schools, colleges, and universities were driven from the AM radio band in the early days of radio. As a result, Congress ordered the Federal Communications Commission (FCC) to implement a policy which would allow educational broadcasters, and commercial broadcasters to establish themselves without competing for channels on the newly created FM band. The FCC responded by reserving the first twenty channels (88.1 through 91.9 Mhz) of the FM band for educational broadcasters. There was much enthusiasm for the new medium. How-ever, with the outbreak of World War II development of FM was halted. After the war, television became the dominant medium, and AM began its period of decline. Interest in FM diminished and development all but ceased. With the 1960's came a renewed interest in FM broadcasting. The AM broadcast band had become saturated, and the FCC adopted standards for FM stereophonic sound, and thus began a period of rapid growth that continues today. Like its predecessor, AM radio, the FM radio band is filling up. What is unique, is that while FM radio is enjoying a period of tremendous growth and commercial success; opportunities for frequencies exist because channels were "reserved" for applicants who will offer educational, instructional, and cultural programming. By including these programs in their schedules, schools, churches, and other non-profit groups are establishing FM stations in ever increasing numbers. And thanks to a ruling in the early 80's called "Docket 80-90", commercial channels that were unavailable prior to the ruling, are now able to be utilized. The opportunity for establishing a FM radio station, in-creased by the Docket 80-90 rules of the 80's, and now again in the late 90's with the new Low Power FM proposal substantially raise the number of FM radio channels available.