A review of trends in broadcasting and an overall economic profile of the broadcasting industry for 1972, with projections for 1973, are given by a collection of tables and graphs. The first portion presents data on total advertising expenditures and trends, along with information on the gross national product and personal consumption spending. Following this is a large section devoted to the television industry, including figures on the number of sets purchased in 1972, total advertising revenues broken out by source (network, local or spot), television revenues by geographic market, amount of time sales, and growth rates of cable television. Trends in radio are also covered, in much the same way as those in television. Total advertising expenditures and broadcast revenues are detailed in tables, as are information about revenue by geographic market and material on income for FM stations. (PB)