Frequencies for first 10,000 rows of per_no variable in miper dataset :

     per_no |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      9,863       98.63       98.63
          2 |        100        1.00       99.63
          3 |         22        0.22       99.85
          4 |          6        0.06       99.91
          5 |          6        0.06       99.97
          6 |          2        0.02       99.99
          7 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016