Frequencies for first 10,000 rows of cig_3 variable in natlterr2014 dataset :

 Cigarettes |
        3rd |
  Trimester |
      00-97 |
  Number of |
 cigarettes |
      daily |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,630       86.30       86.30
          1 |         15        0.15       86.45
          2 |         18        0.18       86.63
          3 |         14        0.14       86.77
          4 |         14        0.14       86.91
          5 |         27        0.27       87.18
          6 |         15        0.15       87.33
          7 |         11        0.11       87.44
          8 |          4        0.04       87.48
          9 |          1        0.01       87.49
         10 |         47        0.47       87.96
         11 |          1        0.01       87.97
         12 |          3        0.03       88.00
         13 |          1        0.01       88.01
         14 |          1        0.01       88.02
         15 |          2        0.02       88.04
         20 |         13        0.13       88.17
         99 |        106        1.06       89.23
          . |      1,077       10.77      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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