Frequencies for first 10,000 rows of cig_3 variable in natl2013 dataset :

 Cigarettes |
        3rd |
  Trimester |
        RFP |
575=f_tobac |
        o R |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,721       87.21       87.21
          1 |         73        0.73       87.94
          2 |        117        1.17       89.11
          3 |        140        1.40       90.51
          4 |        103        1.03       91.54
          5 |        171        1.71       93.25
          6 |         54        0.54       93.79
          7 |         36        0.36       94.15
          8 |         21        0.21       94.36
          9 |          6        0.06       94.42
         10 |        196        1.96       96.38
         11 |          3        0.03       96.41
         12 |          5        0.05       96.46
         14 |          1        0.01       96.47
         15 |         13        0.13       96.60
         16 |          1        0.01       96.61
         20 |         45        0.45       97.06
         23 |          1        0.01       97.07
         24 |          1        0.01       97.08
         25 |          1        0.01       97.09
         30 |          1        0.01       97.10
         40 |          9        0.09       97.19
         45 |          1        0.01       97.20
         50 |          1        0.01       97.21
         60 |          1        0.01       97.22
         73 |          1        0.01       97.23
         80 |          7        0.07       97.30
         99 |        270        2.70      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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