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

    Alcohol |
       Test |
    Results |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        979        9.79        9.79
          1 |         20        0.20        9.99
          2 |         36        0.36       10.35
          3 |         28        0.28       10.63
          4 |         37        0.37       11.00
          5 |         31        0.31       11.31
          6 |         42        0.42       11.73
          7 |         41        0.41       12.14
          8 |         34        0.34       12.48
          9 |         51        0.51       12.99
         10 |         52        0.52       13.51
         11 |         44        0.44       13.95
         12 |         58        0.58       14.53
         13 |         56        0.56       15.09
         14 |         60        0.60       15.69
         15 |         67        0.67       16.36
         16 |         67        0.67       17.03
         17 |         54        0.54       17.57
         18 |         57        0.57       18.14
         19 |         55        0.55       18.69
         20 |         45        0.45       19.14
         21 |         51        0.51       19.65
         22 |         50        0.50       20.15
         23 |         38        0.38       20.53
         24 |         39        0.39       20.92
         25 |         29        0.29       21.21
         26 |         31        0.31       21.52
         27 |         19        0.19       21.71
         28 |         28        0.28       21.99
         29 |         19        0.19       22.18
         30 |         21        0.21       22.39
         31 |         16        0.16       22.55
         32 |          9        0.09       22.64
         33 |         11        0.11       22.75
         34 |          6        0.06       22.81
         35 |          6        0.06       22.87
         36 |          1        0.01       22.88
         37 |          5        0.05       22.93
         38 |          2        0.02       22.95
         39 |          2        0.02       22.97
         40 |          1        0.01       22.98
         41 |          1        0.01       22.99
         42 |          1        0.01       23.00
         43 |          1        0.01       23.01
         95 |         11        0.11       23.12
         96 |      5,324       53.24       76.36
         97 |        488        4.88       81.24
         99 |      1,876       18.76      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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