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

     per_no |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      9,848       98.48       98.48
          2 |        112        1.12       99.60
          3 |         24        0.24       99.84
          4 |          6        0.06       99.90
          5 |          5        0.05       99.95
          6 |          1        0.01       99.96
          7 |          1        0.01       99.97
          8 |          1        0.01       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