Frequencies for first 10,000 rows of esrd_ntwrk_num variable in pos2008 dataset :

       esrd |
  network # |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,153       91.53       91.53
         05 |          1        0.01       91.54
         08 |        138        1.38       92.92
         13 |         94        0.94       93.86
         15 |        140        1.40       95.26
         16 |          6        0.06       95.32
         17 |        167        1.67       96.99
         18 |        301        3.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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