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

  method of |
    alcohol |
determinati |
      on by |
     police |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        632        6.32        6.32
          2 |        158        1.58        7.90
          3 |        190        1.90        9.80
          4 |         50        0.50       10.30
          5 |        269        2.69       12.99
          8 |         62        0.62       13.61
          9 |      8,639       86.39      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016