Frequencies for test_res variable in person dataset :

    Alcohol |
       Test |
    Results |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         72        5.45        5.45
          1 |          2        0.15        5.60
          2 |          1        0.08        5.67
          3 |          1        0.08        5.75
          4 |          3        0.23        5.98
          5 |          1        0.08        6.05
          6 |          3        0.23        6.28
          7 |          4        0.30        6.58
          8 |          1        0.08        6.66
          9 |          2        0.15        6.81
         10 |          5        0.38        7.19
         11 |          6        0.45        7.64
         12 |          4        0.30        7.94
         13 |          6        0.45        8.40
         14 |          8        0.61        9.00
         15 |         10        0.76        9.76
         16 |         15        1.13       10.89
         17 |          3        0.23       11.12
         18 |          9        0.68       11.80
         19 |         10        0.76       12.56
         20 |          5        0.38       12.93
         21 |          2        0.15       13.09
         22 |          5        0.38       13.46
         23 |          9        0.68       14.15
         24 |          6        0.45       14.60
         25 |          6        0.45       15.05
         26 |          1        0.08       15.13
         27 |          2        0.15       15.28
         28 |          2        0.15       15.43
         29 |          3        0.23       15.66
         30 |          1        0.08       15.73
         32 |          2        0.15       15.89
         96 |      1,100       83.21       99.09
         97 |         12        0.91      100.00
------------+-----------------------------------
      Total |      1,322      100.00

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