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

     per_no |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      9,890       98.90       98.90
          2 |         78        0.78       99.68
          3 |         14        0.14       99.82
          4 |          6        0.06       99.88
          5 |          3        0.03       99.91
          6 |          3        0.03       99.94
          7 |          2        0.02       99.96
          8 |          2        0.02       99.98
          9 |          1        0.01       99.99
         10 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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