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

  Method of |
    Alcohol |
Determinati |
         on |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        639        6.39        6.39
          2 |         13        0.13        6.52
          3 |         87        0.87        7.39
          4 |          1        0.01        7.40
          5 |        828        8.28       15.68
          8 |          3        0.03       15.71
          9 |      8,429       84.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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