Frequencies for first 10,000 rows of esrd_ntwrk_num variable in pos2003 dataset :

       esrd |
  network # |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,191       91.91       91.91
         05 |          2        0.02       91.93
         08 |        123        1.23       93.16
         13 |         83        0.83       93.99
         15 |        113        1.13       95.12
         16 |          3        0.03       95.15
         17 |        170        1.70       96.85
         18 |        315        3.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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