Frequencies for first 10,000 rows of f_cigs_1 variable in natl2017 dataset :

  Reporting |
   Flag for |
 Cigarettes |
        1st |
Trimester 0 |
Non-Reporti |
         ng |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          6        0.06        0.06
          1 |      9,994       99.94      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 19 Sep 2018