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

  DRUG TEST |
  RESULTS-3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,689       96.89       96.89
        136 |          2        0.02       96.91
        155 |          1        0.01       96.92
        157 |          2        0.02       96.94
        165 |          1        0.01       96.95
        187 |          2        0.02       96.97
        300 |          3        0.03       97.00
        304 |          1        0.01       97.01
        308 |          2        0.02       97.03
        321 |          3        0.03       97.06
        351 |          6        0.06       97.12
        358 |          2        0.02       97.14
        367 |          4        0.04       97.18
        373 |          1        0.01       97.19
        401 |          2        0.02       97.21
        402 |          5        0.05       97.26
        407 |         16        0.16       97.42
        410 |         18        0.18       97.60
        417 |         12        0.12       97.72
        423 |          1        0.01       97.73
        433 |          1        0.01       97.74
        513 |          2        0.02       97.76
        515 |          1        0.01       97.77
        600 |          3        0.03       97.80
        603 |          3        0.03       97.83
        605 |          1        0.01       97.84
        606 |         13        0.13       97.97
        695 |          6        0.06       98.03
        702 |          1        0.01       98.04
        996 |         16        0.16       98.20
        998 |          1        0.01       98.21
        999 |        179        1.79      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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