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

    ALCOHOL |
DETERMINATI |
         ON |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         97        0.97        0.97
          2 |        135        1.35        2.32
          3 |         56        0.56        2.88
          4 |          7        0.07        2.95
          5 |        465        4.65        7.60
          8 |        104        1.04        8.64
          9 |      9,136       91.36      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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