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

  Method of |
    Alcohol |
Determinati |
         on |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        539        5.39        5.39
          2 |          2        0.02        5.41
          3 |         91        0.91        6.32
          5 |        878        8.78       15.10
          8 |          4        0.04       15.14
          9 |      8,486       84.86      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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