Frequencies for first 10,000 rows of cig_rec6 variable in natl2003 dataset :

 Cigarettes |
   Recode U |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,219       82.19       82.19
          1 |        727        7.27       89.46
          2 |        625        6.25       95.71
          3 |        180        1.80       97.51
          4 |         12        0.12       97.63
          6 |        237        2.37      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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