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

     police |
   reported |
    alcohol |
involvement |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,808       38.08       38.08
          1 |        900        9.00       47.08
          8 |      3,063       30.63       77.71
          9 |      2,229       22.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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