Frequencies for first 10,000 rows of opdou09x variable in h126f dataset :

 DOCTOR AMT |
    PD, OTH |
     PUBLIC |
  (IMPUTED) |      Freq.     Percent        Cum.
------------+-----------------------------------
         -1 |         21        0.21        0.21
          0 |      9,936       99.36       99.57
          2 |          8        0.08       99.65
       4.75 |          1        0.01       99.66
       6.83 |          1        0.01       99.67
       8.66 |          1        0.01       99.68
      10.32 |          1        0.01       99.69
      12.25 |          4        0.04       99.73
      24.17 |          1        0.01       99.74
       29.8 |          1        0.01       99.75
      31.23 |          1        0.01       99.76
      31.96 |          2        0.02       99.78
       32.6 |          1        0.01       99.79
      33.63 |          1        0.01       99.80
      35.69 |          1        0.01       99.81
       38.1 |          1        0.01       99.82
      39.07 |          1        0.01       99.83
      55.17 |          2        0.02       99.85
      63.85 |          2        0.02       99.87
         70 |          1        0.01       99.88
      79.07 |          1        0.01       99.89
     102.31 |          1        0.01       99.90
      115.6 |          1        0.01       99.91
     122.31 |          2        0.02       99.93
     150.21 |          2        0.02       99.95
     208.05 |          1        0.01       99.96
     584.64 |          1        0.01       99.97
       1000 |          1        0.01       99.98
    1318.52 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Feb 2018