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  1. Public Televison Stations:1970-1984     Item                    1970     1974     1976     1980     1984  
  2.  
  3. Stations broadcasting    (1) 190  (2) 238  (3) 253      281      303
  4.  
  5. Total weekly broadcast
  6.   hours                (1)12,217   18,231   22,096   27,643   32,293
  7.   General programs         7,697   10,868   14,329   19,508   23,154
  8.     Percent of total
  9.       hours                 63.0     59.3     64.8     69.6     71.7
  10.   Instructional programs(4)4,520    7,453    7,766    8,135    9,139
  11.  
  12. Average weekly broadcast
  13.    hours per station        65.3     80.7     90.9     99.8    106.6
  14.   General programing        41.1     47.9     59.0     69.4     76.4
  15.   Instructional
  16.     programing(4)           24.2     32.8     31.9     30.4     30.2
  17.  
  18.  
  19. 1. 187 stations in 1970; details include data for reporting stations
  20.    only.
  21. 2. Includes data for 227 stations only, representing 147 primary
  22.    broadcasters; does not include secondary broadcasters.
  23. 3. Includes data for 243 stations only, representing 151 primary
  24.    broadcasters.
  25. 4. Beginning 1974, includes material from Children's Television
  26.    Workshops.
  27.  
  28. Source:Through 1970, National Instructional Television Center, Bloom-
  29.         ington, IN; 1974-1984 Corporation for Public Broadcasting.
  30.