Frequencies for per_no variable in miper dataset :

     per_no |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        813       98.43       98.43
          2 |          9        1.09       99.52
          3 |          2        0.24       99.76
          4 |          1        0.12       99.88
          5 |          1        0.12      100.00
------------+-----------------------------------
      Total |        826      100.00

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