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

    ALCOHOL |
INVOLVEMENT |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,721       37.21       37.21
          1 |        877        8.77       45.98
          8 |      3,696       36.96       82.94
          9 |      1,706       17.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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