Frequencies for first 10,000 rows of alcohol variable in natlterr2005 dataset :

Alcohol Use |
          U |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         17        0.17        0.17
          2 |      4,483       44.83       45.00
          9 |      1,755       17.55       62.55
          . |      3,745       37.45      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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