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

  DRUG TEST |
  RESULTS-3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,748       97.48       97.48
          1 |         14        0.14       97.62
        136 |          1        0.01       97.63
        157 |          2        0.02       97.65
        177 |          1        0.01       97.66
        187 |          4        0.04       97.70
        189 |          4        0.04       97.74
        295 |          1        0.01       97.75
        300 |          2        0.02       97.77
        304 |          2        0.02       97.79
        321 |          3        0.03       97.82
        337 |          2        0.02       97.84
        343 |          2        0.02       97.86
        348 |          1        0.01       97.87
        351 |          4        0.04       97.91
        367 |          1        0.01       97.92
        376 |          2        0.02       97.94
        387 |          1        0.01       97.95
        401 |          3        0.03       97.98
        402 |          2        0.02       98.00
        407 |          6        0.06       98.06
        410 |         10        0.10       98.16
        417 |         20        0.20       98.36
        513 |          1        0.01       98.37
        515 |          2        0.02       98.39
        600 |          4        0.04       98.43
        603 |          1        0.01       98.44
        605 |          3        0.03       98.47
        606 |         14        0.14       98.61
        695 |         14        0.14       98.75
        795 |          1        0.01       98.76
        996 |         42        0.42       99.18
        999 |         82        0.82      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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