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

     Police |
   Reported |
    Alcohol |
Involvement |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,473       34.73       34.73
          1 |      1,697       16.97       51.70
          8 |      3,542       35.42       87.12
          9 |      1,288       12.88      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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