Frequencies for first 10,000 rows of cig3_r variable in natl2014 dataset :

 Cigarettes |
        3rd |
  Trimester |
   Recode 0 |
  Nonsmoker |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,677       86.77       86.77
          1 |        609        6.09       92.86
          2 |        300        3.00       95.86
          3 |         70        0.70       96.56
          4 |         11        0.11       96.67
          5 |         11        0.11       96.78
          6 |        322        3.22      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Jun 2016