Frequencies for first 10,000 rows of tobacco variable in nhamcsopd1999 dataset :

    tobacco |
use/exposur |
          e |
 couns/educ |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,688       96.88       96.88
          1 |        312        3.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016