Frequencies for first 10,000 rows of cig_3 variable in natlterr2015 dataset :

 Cigarettes |
        3rd |
  Trimester |
      00-97 |
  Number of |
 cigarettes |
      daily |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,590       85.90       85.90
          1 |         12        0.12       86.02
          2 |         29        0.29       86.31
          3 |         19        0.19       86.50
          4 |         33        0.33       86.83
          5 |         34        0.34       87.17
          6 |          9        0.09       87.26
          7 |          7        0.07       87.33
          8 |          1        0.01       87.34
          9 |          2        0.02       87.36
         10 |         38        0.38       87.74
         12 |          2        0.02       87.76
         15 |          2        0.02       87.78
         20 |         21        0.21       87.99
         30 |          1        0.01       88.00
         40 |          1        0.01       88.01
         60 |          2        0.02       88.03
         99 |        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