Frequencies for first 10,000 rows of esrd_ntwrk_num variable in pos2000 dataset :

       esrd |
  network # |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,270       92.70       92.70
         02 |          1        0.01       92.71
         05 |          1        0.01       92.72
         08 |        111        1.11       93.83
         13 |         69        0.69       94.52
         14 |          2        0.02       94.54
         15 |         95        0.95       95.49
         16 |          2        0.02       95.51
         17 |        163        1.63       97.14
         18 |        286        2.86      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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