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

    Alcohol |
       Test |
    Results |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        992        9.92        9.92
          1 |         13        0.13       10.05
          2 |         37        0.37       10.42
          3 |         39        0.39       10.81
          4 |         32        0.32       11.13
          5 |         41        0.41       11.54
          6 |         30        0.30       11.84
          7 |         27        0.27       12.11
          8 |         44        0.44       12.55
          9 |         42        0.42       12.97
         10 |         48        0.48       13.45
         11 |         60        0.60       14.05
         12 |         62        0.62       14.67
         13 |         54        0.54       15.21
         14 |         68        0.68       15.89
         15 |         79        0.79       16.68
         16 |         56        0.56       17.24
         17 |         64        0.64       17.88
         18 |         74        0.74       18.62
         19 |         76        0.76       19.38
         20 |         86        0.86       20.24
         21 |         61        0.61       20.85
         22 |         72        0.72       21.57
         23 |         53        0.53       22.10
         24 |         42        0.42       22.52
         25 |         39        0.39       22.91
         26 |         32        0.32       23.23
         27 |         21        0.21       23.44
         28 |         20        0.20       23.64
         29 |         28        0.28       23.92
         30 |         22        0.22       24.14
         31 |         10        0.10       24.24
         32 |          8        0.08       24.32
         33 |          6        0.06       24.38
         34 |          9        0.09       24.47
         35 |          3        0.03       24.50
         36 |          3        0.03       24.53
         37 |          7        0.07       24.60
         38 |          1        0.01       24.61
         39 |          3        0.03       24.64
         40 |          2        0.02       24.66
         41 |          3        0.03       24.69
         42 |          2        0.02       24.71
         43 |          3        0.03       24.74
         44 |          1        0.01       24.75
         45 |          1        0.01       24.76
         46 |          1        0.01       24.77
         50 |          1        0.01       24.78
         54 |          2        0.02       24.80
         95 |         11        0.11       24.91
         96 |      6,547       65.47       90.38
         97 |        604        6.04       96.42
         99 |        358        3.58      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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