Frequencies for first 10,000 rows of esrd_ntwrk_num variable in pos2005 dataset :

       esrd |
  network # |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,186       91.86       91.86
         05 |          1        0.01       91.87
         08 |        130        1.30       93.17
         13 |         88        0.88       94.05
         15 |        123        1.23       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