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

     per_no |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      9,906       99.06       99.06
          2 |         67        0.67       99.73
          3 |         14        0.14       99.87
          4 |          6        0.06       99.93
          5 |          2        0.02       99.95
          6 |          2        0.02       99.97
          7 |          1        0.01       99.98
          8 |          1        0.01       99.99
          9 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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