Frequencies for first 10,000 rows of drugres3 variable in person dataset :

  DRUG TEST |
  RESULTS-3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,751       97.51       97.51
          1 |          1        0.01       97.52
        128 |          1        0.01       97.53
        155 |          2        0.02       97.55
        157 |          2        0.02       97.57
        177 |          4        0.04       97.61
        187 |          4        0.04       97.65
        189 |          1        0.01       97.66
        300 |          1        0.01       97.67
        304 |          4        0.04       97.71
        316 |          1        0.01       97.72
        321 |          1        0.01       97.73
        343 |          3        0.03       97.76
        348 |          1        0.01       97.77
        351 |          6        0.06       97.83
        358 |          1        0.01       97.84
        367 |          2        0.02       97.86
        401 |          1        0.01       97.87
        402 |          3        0.03       97.90
        407 |         11        0.11       98.01
        410 |         12        0.12       98.13
        417 |         12        0.12       98.25
        600 |          7        0.07       98.32
        601 |          1        0.01       98.33
        603 |          6        0.06       98.39
        605 |          1        0.01       98.40
        606 |         19        0.19       98.59
        695 |          8        0.08       98.67
        702 |          2        0.02       98.69
        795 |          1        0.01       98.70
        996 |         23        0.23       98.93
        999 |        107        1.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016