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

     per_no |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      9,858       98.58       98.58
          2 |        102        1.02       99.60
          3 |         25        0.25       99.85
          4 |          7        0.07       99.92
          5 |          4        0.04       99.96
          6 |          2        0.02       99.98
          7 |          1        0.01       99.99
          8 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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