Frequencies for minimumtobaccofreemonthsrule variable in busrules2016 dataset :

       Minimum |
  Tobacco Free |
   Months Rule |      Freq.     Percent        Cum.
---------------+-----------------------------------
             3 |         14        0.16        0.16
             6 |      4,619       52.49       52.65
Not Applicable |      4,166       47.35      100.00
---------------+-----------------------------------
         Total |      8,799      100.00

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