Frequencies for first 10,000 rows of cig_3 variable in natlterr2010 dataset :

 Cigarettes |
        3rd |
  Trimester |
        RFP |
575=f_tobac |
        o R |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,743       47.43       47.43
          1 |          5        0.05       47.48
          2 |          2        0.02       47.50
          4 |          1        0.01       47.51
          5 |          1        0.01       47.52
          7 |          2        0.02       47.54
          8 |          1        0.01       47.55
         99 |        589        5.89       53.44
          . |      4,656       46.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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