Frequencies for first 10,000 rows of alcohol variable in natl2002 dataset :

Alcohol Use |
     During |
  Pregnancy |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        251        2.51        2.51
          2 |      9,657       96.57       99.08
          9 |         92        0.92      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015