Frequencies for first 10,000 rows of parent_provider_number variable in pos1994 dataset :

     parent |
   provider |
     number |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,930       99.30       99.30
     010001 |          1        0.01       99.31
     010015 |          1        0.01       99.32
     010021 |          1        0.01       99.33
     010036 |          1        0.01       99.34
     010043 |          1        0.01       99.35
     010058 |          1        0.01       99.36
     010059 |          1        0.01       99.37
     010080 |          1        0.01       99.38
     010098 |          1        0.01       99.39
     010108 |          1        0.01       99.40
     010109 |          1        0.01       99.41
     010110 |          1        0.01       99.42
     010112 |          1        0.01       99.43
     010118 |          4        0.04       99.47
     010134 |          1        0.01       99.48
     010138 |          1        0.01       99.49
     040004 |          1        0.01       99.50
     040014 |          4        0.04       99.54
     040017 |          1        0.01       99.55
     040020 |          1        0.01       99.56
     040042 |          1        0.01       99.57
     040060 |          1        0.01       99.58
     040067 |          1        0.01       99.59
     040071 |          1        0.01       99.60
     040076 |          2        0.02       99.62
     040078 |          1        0.01       99.63
     040084 |          1        0.01       99.64
     040090 |          1        0.01       99.65
     040091 |          3        0.03       99.68
     040106 |          1        0.01       99.69
     040118 |          2        0.02       99.71
     040119 |          4        0.04       99.75
     050051 |          1        0.01       99.76
     050092 |          2        0.02       99.78
     050121 |          2        0.02       99.80
     050148 |          1        0.01       99.81
     050397 |          1        0.01       99.82
     050430 |          1        0.01       99.83
     050433 |          1        0.01       99.84
     050436 |          1        0.01       99.85
     050443 |          1        0.01       99.86
     050444 |          1        0.01       99.87
     050568 |          1        0.01       99.88
     050682 |          1        0.01       99.89
     055546 |          1        0.01       99.90
     250069 |          1        0.01       99.91
     260078 |          5        0.05       99.96
     260120 |          1        0.01       99.97
     450703 |          2        0.02       99.99
     555187 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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