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

    Alcohol |
       Test |
    Results |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        959        9.59        9.59
          1 |         19        0.19        9.78
          2 |         41        0.41       10.19
          3 |         29        0.29       10.48
          4 |         25        0.25       10.73
          5 |         39        0.39       11.12
          6 |         42        0.42       11.54
          7 |         41        0.41       11.95
          8 |         48        0.48       12.43
          9 |         45        0.45       12.88
         10 |         51        0.51       13.39
         11 |         57        0.57       13.96
         12 |         59        0.59       14.55
         13 |         55        0.55       15.10
         14 |         61        0.61       15.71
         15 |         75        0.75       16.46
         16 |         62        0.62       17.08
         17 |         66        0.66       17.74
         18 |         80        0.80       18.54
         19 |         78        0.78       19.32
         20 |         68        0.68       20.00
         21 |         59        0.59       20.59
         22 |         41        0.41       21.00
         23 |         44        0.44       21.44
         24 |         35        0.35       21.79
         25 |         27        0.27       22.06
         26 |         38        0.38       22.44
         27 |         18        0.18       22.62
         28 |         19        0.19       22.81
         29 |         17        0.17       22.98
         30 |         12        0.12       23.10
         31 |          5        0.05       23.15
         32 |          7        0.07       23.22
         33 |          9        0.09       23.31
         34 |          6        0.06       23.37
         35 |          3        0.03       23.40
         36 |          1        0.01       23.41
         37 |          8        0.08       23.49
         38 |          3        0.03       23.52
         39 |          1        0.01       23.53
         40 |          1        0.01       23.54
         41 |          1        0.01       23.55
         44 |          1        0.01       23.56
         45 |          2        0.02       23.58
         50 |          1        0.01       23.59
         53 |          1        0.01       23.60
         62 |          1        0.01       23.61
         95 |         14        0.14       23.75
         96 |      5,569       55.69       79.44
         97 |        652        6.52       85.96
         99 |      1,404       14.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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