Frequencies for first 10,000 rows of prov1560 variable in pos1991 dataset :

     parent |
   provider |
     number |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,983       99.83       99.83
     040014 |          1        0.01       99.84
     040119 |          3        0.03       99.87
     050092 |          2        0.02       99.89
     050342 |          1        0.01       99.90
     050397 |          1        0.01       99.91
     050444 |          1        0.01       99.92
     055546 |          1        0.01       99.93
     060041 |          2        0.02       99.95
     260078 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016