Frequencies for first 10,000 rows of cig3_r variable in natlterr2015 dataset :

 Cigarettes |
        3rd |
  Trimester |
   Recode 0 |
  Nonsmoker |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,590       85.90       85.90
          1 |        127        1.27       87.17
          2 |         57        0.57       87.74
          3 |         25        0.25       87.99
          4 |          2        0.02       88.01
          5 |          2        0.02       88.03
          6 |        119        1.19       89.22
          . |      1,078       10.78      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Oct 2016