Frequencies for first 10,000 rows of esrd_ntwrk_num variable in pos2007 dataset :

       esrd |
  network # |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,172       91.72       91.72
         05 |          1        0.01       91.73
         08 |        133        1.33       93.06
         13 |         92        0.92       93.98
         15 |        130        1.30       95.28
         16 |          5        0.05       95.33
         17 |        167        1.67       97.00
         18 |        300        3.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017