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

    ALCOHOL |
DETERMINATI |
         ON |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        175        1.75        1.75
          2 |         54        0.54        2.29
          3 |         50        0.50        2.79
          4 |         14        0.14        2.93
          5 |        669        6.69        9.62
          8 |         81        0.81       10.43
          9 |      8,957       89.57      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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