Frequencies for first 10,000 rows of issuerid variable in rate2018 dataset :

  Issuer ID |      Freq.     Percent        Cum.
------------+-----------------------------------
      21989 |      1,855       18.55       18.55
      38344 |        765        7.65       26.20
      73836 |      7,380       73.80      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 23 May 2018