Frequencies for first 10,000 rows of issuerid variable in rate2017 dataset :

  Issuer ID |      Freq.     Percent        Cum.
------------+-----------------------------------
      21989 |      1,736       17.36       17.36
      38344 |      1,794       17.94       35.30
      45858 |        552        5.52       40.82
      73836 |      5,918       59.18      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 Dec 2017