Frequencies for first 10,000 rows of a_alctes variable in per_aux dataset :

    Alcohol |
    Testing |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,399       13.99       13.99
          2 |      1,663       16.63       30.62
          3 |      5,770       57.70       88.32
          4 |        396        3.96       92.28
          5 |        772        7.72      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016