Frequencies for first 10,000 rows of drugres2 variable in person dataset :

  DRUG TEST |
  RESULTS-2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,579       95.79       95.79
          1 |        106        1.06       96.85
        128 |          2        0.02       96.87
        136 |          1        0.01       96.88
        155 |          5        0.05       96.93
        167 |          1        0.01       96.94
        177 |          8        0.08       97.02
        187 |          3        0.03       97.05
        208 |          2        0.02       97.07
        300 |          2        0.02       97.09
        304 |          5        0.05       97.14
        321 |          8        0.08       97.22
        334 |          1        0.01       97.23
        351 |         16        0.16       97.39
        352 |          1        0.01       97.40
        355 |          1        0.01       97.41
        358 |          3        0.03       97.44
        367 |          1        0.01       97.45
        401 |          8        0.08       97.53
        402 |          4        0.04       97.57
        405 |          1        0.01       97.58
        407 |         46        0.46       98.04
        410 |          1        0.01       98.05
        417 |         57        0.57       98.62
        423 |          1        0.01       98.63
        600 |          3        0.03       98.66
        603 |          6        0.06       98.72
        606 |         10        0.10       98.82
        695 |          9        0.09       98.91
        702 |          1        0.01       98.92
        996 |        107        1.07       99.99
        997 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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