Frequencies for first 10,000 rows of cig_1 variable in natl2014 dataset :

 Cigarettes |
        1st |
  Trimester |
      00-97 |
  Number of |
 cigarettes |
      daily |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,452       84.52       84.52
          1 |         50        0.50       85.02
          2 |         84        0.84       85.86
          3 |        109        1.09       86.95
          4 |         80        0.80       87.75
          5 |        207        2.07       89.82
          6 |         52        0.52       90.34
          7 |         45        0.45       90.79
          8 |         33        0.33       91.12
          9 |          6        0.06       91.18
         10 |        326        3.26       94.44
         11 |          2        0.02       94.46
         12 |         13        0.13       94.59
         13 |          1        0.01       94.60
         15 |         36        0.36       94.96
         16 |          3        0.03       94.99
         18 |          1        0.01       95.00
         20 |        140        1.40       96.40
         23 |          1        0.01       96.41
         24 |          2        0.02       96.43
         30 |         11        0.11       96.54
         40 |         12        0.12       96.66
         41 |          1        0.01       96.67
         48 |          1        0.01       96.68
         50 |          1        0.01       96.69
         60 |          5        0.05       96.74
         80 |          8        0.08       96.82
         90 |          1        0.01       96.83
         99 |        317        3.17      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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