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

    ALCOHOL |
DETERMINATI |
         ON |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        743        7.43        7.43
          2 |         59        0.59        8.02
          3 |         24        0.24        8.26
          4 |         31        0.31        8.57
          5 |        898        8.98       17.55
          8 |         78        0.78       18.33
          9 |      8,167       81.67      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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