Frequencies for first 10,000 rows of issuerid variable in bencs2015 dataset :

  Issuer ID |      Freq.     Percent        Cum.
------------+-----------------------------------
      12303 |        108        1.08        1.08
      12438 |         18        0.18        1.26
      12538 |        216        2.16        3.42
      13576 |         18        0.18        3.60
      15833 |        117        1.17        4.77
      15980 |         66        0.66        5.43
      16842 |      7,050       70.50       75.93
      17017 |         18        0.18       76.11
      17100 |         72        0.72       76.83
      17382 |         18        0.18       77.01
      17454 |         54        0.54       77.55
      17540 |         54        0.54       78.09
      18156 |         80        0.80       78.89
      18628 |      2,056       20.56       99.45
      18756 |          5        0.05       99.50
      19419 |         50        0.50      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 9 Dec 2017