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

 Cigarettes |
  Per Day U |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,219       82.19       82.19
          1 |         80        0.80       82.99
          2 |        117        1.17       84.16
          3 |        154        1.54       85.70
          4 |        138        1.38       87.08
          5 |        238        2.38       89.46
          6 |         80        0.80       90.26
          7 |         62        0.62       90.88
          8 |         43        0.43       91.31
          9 |          6        0.06       91.37
         10 |        434        4.34       95.71
         11 |          2        0.02       95.73
         12 |         14        0.14       95.87
         13 |          3        0.03       95.90
         15 |         48        0.48       96.38
         16 |          1        0.01       96.39
         17 |          1        0.01       96.40
         18 |          2        0.02       96.42
         20 |        109        1.09       97.51
         24 |          1        0.01       97.52
         25 |          1        0.01       97.53
         27 |          2        0.02       97.55
         30 |          4        0.04       97.59
         37 |          1        0.01       97.60
         40 |          3        0.03       97.63
         99 |        237        2.37      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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