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

  method of |
    alcohol |
determinati |
      on by |
     police |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        468        4.68        4.68
          2 |         84        0.84        5.52
          3 |        163        1.63        7.15
          4 |         66        0.66        7.81
          5 |        301        3.01       10.82
          8 |         24        0.24       11.06
          9 |      8,894       88.94      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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