Frequencies for first 10,000 rows of cig_rec6 variable in natl2006 dataset :

 Cigarettes |
   Recode U |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,420       84.20       84.20
          1 |        748        7.48       91.68
          2 |        504        5.04       96.72
          3 |        149        1.49       98.21
          4 |          2        0.02       98.23
          5 |          2        0.02       98.25
          6 |        175        1.75      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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