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

  Method of |
    Alcohol |
Determinati |
         on |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        939        9.39        9.39
          2 |         10        0.10        9.49
          3 |         38        0.38        9.87
          4 |          2        0.02        9.89
          5 |        507        5.07       14.96
          8 |          4        0.04       15.00
          9 |      8,500       85.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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