Frequencies for first 10,000 rows of cig1_r variable in natl2014 dataset :

 Cigarettes |
        1st |
  Trimester |
   Recode 0 |
  Nonsmoker |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,452       84.52       84.52
          1 |        530        5.30       89.82
          2 |        462        4.62       94.44
          3 |        196        1.96       96.40
          4 |         26        0.26       96.66
          5 |         17        0.17       96.83
          6 |        317        3.17      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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