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

     per_no |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      9,843       98.43       98.43
          2 |        109        1.09       99.52
          3 |         24        0.24       99.76
          4 |         13        0.13       99.89
          5 |          7        0.07       99.96
          6 |          3        0.03       99.99
          7 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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