Frequencies for first 10,000 rows of alcohol variable in natl2003 dataset :

Alcohol Use |
          U |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        203        2.03        2.03
          2 |      9,711       97.11       99.14
          9 |         86        0.86      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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