Frequencies for minimumtobaccofreemonthsrule variable in busrules2014 dataset :

       Minimum |
  Tobacco Free |
   Months Rule |      Freq.     Percent        Cum.
---------------+-----------------------------------
               |        404       19.21       19.21
            12 |         18        0.86       20.07
             3 |          5        0.24       20.30
             4 |          6        0.29       20.59
             6 |        313       14.88       35.47
            60 |          1        0.05       35.52
           999 |          2        0.10       35.62
Not Applicable |      1,354       64.38      100.00
---------------+-----------------------------------
         Total |      2,103      100.00

by Jean Roth , jroth@nber.org , 6 Oct 2016