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

 Cigarettes |
  Per Day U |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,089       30.89       30.89
          1 |         16        0.16       31.05
          2 |         14        0.14       31.19
          3 |         17        0.17       31.36
          4 |         12        0.12       31.48
          5 |         31        0.31       31.79
          6 |          9        0.09       31.88
          7 |          7        0.07       31.95
          8 |          6        0.06       32.01
         10 |        126        1.26       33.27
         12 |          1        0.01       33.28
         14 |          1        0.01       33.29
         20 |         36        0.36       33.65
         30 |          5        0.05       33.70
         40 |          1        0.01       33.71
         60 |          1        0.01       33.72
         99 |      1,284       12.84       46.56
          . |      5,344       53.44      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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