Frequencies for first 10,000 rows of cigs variable in natl2008 dataset :

 Cigarettes |
  Per Day U |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,753       87.53       87.53
          1 |         49        0.49       88.02
          2 |         89        0.89       88.91
          3 |        118        1.18       90.09
          4 |         72        0.72       90.81
          5 |        162        1.62       92.43
          6 |         59        0.59       93.02
          7 |         37        0.37       93.39
          8 |         38        0.38       93.77
          9 |          3        0.03       93.80
         10 |        380        3.80       97.60
         11 |          2        0.02       97.62
         12 |         18        0.18       97.80
         13 |          5        0.05       97.85
         15 |         46        0.46       98.31
         16 |          2        0.02       98.33
         17 |          1        0.01       98.34
         18 |          1        0.01       98.35
         20 |        142        1.42       99.77
         21 |          2        0.02       99.79
         22 |          2        0.02       99.81
         24 |          1        0.01       99.82
         25 |          1        0.01       99.83
         30 |          8        0.08       99.91
         35 |          1        0.01       99.92
         40 |          2        0.02       99.94
         99 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 May 2016