Frequencies for first 10,000 rows of cig_3 variable in natlterr2013 dataset :

 Cigarettes |
        3rd |
  Trimester |
        RFP |
575=f_tobac |
        o R |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,440       84.40       84.40
          1 |         17        0.17       84.57
          2 |         21        0.21       84.78
          3 |         42        0.42       85.20
          4 |         15        0.15       85.35
          5 |         25        0.25       85.60
          6 |          7        0.07       85.67
          7 |          7        0.07       85.74
          8 |          6        0.06       85.80
          9 |          1        0.01       85.81
         10 |         48        0.48       86.29
         20 |         22        0.22       86.51
         40 |          4        0.04       86.55
         60 |          1        0.01       86.56
         90 |          1        0.01       86.57
         99 |        266        2.66       89.23
          . |      1,077       10.77      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015