Frequencies for first 10,000 rows of cig_3 variable in natl2014 dataset :

 Cigarettes |
        3rd |
  Trimester |
      00-97 |
  Number of |
 cigarettes |
      daily |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,677       86.77       86.77
          1 |         73        0.73       87.50
          2 |        110        1.10       88.60
          3 |        136        1.36       89.96
          4 |        103        1.03       90.99
          5 |        187        1.87       92.86
          6 |         57        0.57       93.43
          7 |         31        0.31       93.74
          8 |         24        0.24       93.98
          9 |          4        0.04       94.02
         10 |        184        1.84       95.86
         12 |          3        0.03       95.89
         14 |          1        0.01       95.90
         15 |         18        0.18       96.08
         19 |          1        0.01       96.09
         20 |         47        0.47       96.56
         29 |          1        0.01       96.57
         30 |          4        0.04       96.61
         40 |          6        0.06       96.67
         41 |          1        0.01       96.68
         50 |          1        0.01       96.69
         60 |          4        0.04       96.73
         80 |          4        0.04       96.77
         90 |          1        0.01       96.78
         99 |        322        3.22      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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