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

  Method of |
    Alcohol |
Determinati |
         on |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        571        5.71        5.71
          2 |          4        0.04        5.75
          3 |        108        1.08        6.83
          5 |        910        9.10       15.93
          8 |          1        0.01       15.94
          9 |      8,406       84.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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