Frequencies for first 10,000 rows of cig_rec6 variable in natl2005 dataset :

 Cigarettes |
   Recode U |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,365       83.65       83.65
          1 |        777        7.77       91.42
          2 |        558        5.58       97.00
          3 |        123        1.23       98.23
          4 |          9        0.09       98.32
          6 |        168        1.68      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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