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

    Alcohol |
       Test |
    Results |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        888        8.88        8.88
          1 |         23        0.23        9.11
          2 |         42        0.42        9.53
          3 |         35        0.35        9.88
          4 |         48        0.48       10.36
          5 |         44        0.44       10.80
          6 |         29        0.29       11.09
          7 |         48        0.48       11.57
          8 |         54        0.54       12.11
          9 |         41        0.41       12.52
         10 |         62        0.62       13.14
         11 |         59        0.59       13.73
         12 |         50        0.50       14.23
         13 |         56        0.56       14.79
         14 |         93        0.93       15.72
         15 |         75        0.75       16.47
         16 |         79        0.79       17.26
         17 |         72        0.72       17.98
         18 |         75        0.75       18.73
         19 |         76        0.76       19.49
         20 |         70        0.70       20.19
         21 |         62        0.62       20.81
         22 |         46        0.46       21.27
         23 |         55        0.55       21.82
         24 |         57        0.57       22.39
         25 |         31        0.31       22.70
         26 |         37        0.37       23.07
         27 |         22        0.22       23.29
         28 |         25        0.25       23.54
         29 |         23        0.23       23.77
         30 |         19        0.19       23.96
         31 |         16        0.16       24.12
         32 |          9        0.09       24.21
         33 |          6        0.06       24.27
         34 |          6        0.06       24.33
         35 |          6        0.06       24.39
         36 |          9        0.09       24.48
         37 |          4        0.04       24.52
         38 |          1        0.01       24.53
         39 |          3        0.03       24.56
         40 |          2        0.02       24.58
         41 |          1        0.01       24.59
         43 |          1        0.01       24.60
         44 |          2        0.02       24.62
         54 |          2        0.02       24.64
         61 |          1        0.01       24.65
         76 |          1        0.01       24.66
         95 |         16        0.16       24.82
         96 |      5,699       56.99       81.81
         97 |        598        5.98       87.79
         99 |      1,221       12.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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