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

    Alcohol |
       Test |
    Results |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        905        9.05        9.05
          1 |         18        0.18        9.23
          2 |         39        0.39        9.62
          3 |         40        0.40       10.02
          4 |         41        0.41       10.43
          5 |         36        0.36       10.79
          6 |         39        0.39       11.18
          7 |         39        0.39       11.57
          8 |         42        0.42       11.99
          9 |         36        0.36       12.35
         10 |         47        0.47       12.82
         11 |         44        0.44       13.26
         12 |         64        0.64       13.90
         13 |         61        0.61       14.51
         14 |         62        0.62       15.13
         15 |         73        0.73       15.86
         16 |         66        0.66       16.52
         17 |         61        0.61       17.13
         18 |         71        0.71       17.84
         19 |         59        0.59       18.43
         20 |         62        0.62       19.05
         21 |         51        0.51       19.56
         22 |         60        0.60       20.16
         23 |         59        0.59       20.75
         24 |         44        0.44       21.19
         25 |         34        0.34       21.53
         26 |         29        0.29       21.82
         27 |         25        0.25       22.07
         28 |         25        0.25       22.32
         29 |         25        0.25       22.57
         30 |         10        0.10       22.67
         31 |         14        0.14       22.81
         32 |          9        0.09       22.90
         33 |          5        0.05       22.95
         34 |          5        0.05       23.00
         35 |          1        0.01       23.01
         36 |          1        0.01       23.02
         37 |          5        0.05       23.07
         38 |          5        0.05       23.12
         39 |          4        0.04       23.16
         40 |          3        0.03       23.19
         41 |          2        0.02       23.21
         49 |          1        0.01       23.22
         51 |          2        0.02       23.24
         55 |          1        0.01       23.25
         89 |          1        0.01       23.26
         95 |          8        0.08       23.34
         96 |      5,550       55.50       78.84
         97 |        456        4.56       83.40
         99 |      1,660       16.60      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016