Frequencies for first 10,000 rows of cigs variable in natlterr2005 dataset :

 Cigarettes |
  Per Day U |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,944       39.44       39.44
          1 |         19        0.19       39.63
          2 |         39        0.39       40.02
          3 |         44        0.44       40.46
          4 |         46        0.46       40.92
          5 |         62        0.62       41.54
          6 |         34        0.34       41.88
          7 |         12        0.12       42.00
          8 |         11        0.11       42.11
          9 |          1        0.01       42.12
         10 |        172        1.72       43.84
         11 |          3        0.03       43.87
         12 |          2        0.02       43.89
         13 |          1        0.01       43.90
         15 |          3        0.03       43.93
         17 |          1        0.01       43.94
         20 |         37        0.37       44.31
         30 |          2        0.02       44.33
         50 |          1        0.01       44.34
         99 |      1,821       18.21       62.55
          . |      3,745       37.45      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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