Frequencies for first 10,000 rows of parent_provider_number variable in pos1992 dataset :

     parent |
   provider |
     number |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,970       99.70       99.70
     010036 |          1        0.01       99.71
     010058 |          1        0.01       99.72
     010109 |          1        0.01       99.73
     040014 |          2        0.02       99.75
     040060 |          1        0.01       99.76
     040071 |          1        0.01       99.77
     040076 |          2        0.02       99.79
     040119 |          3        0.03       99.82
     050092 |          2        0.02       99.84
     050148 |          1        0.01       99.85
     050325 |          1        0.01       99.86
     050397 |          1        0.01       99.87
     050430 |          1        0.01       99.88
     050444 |          1        0.01       99.89
     050568 |          1        0.01       99.90
     055546 |          1        0.01       99.91
     060036 |          1        0.01       99.92
     060041 |          2        0.02       99.94
     260078 |          5        0.05       99.99
     260120 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017