Frequencies for childrenonlycontractmaxchildrenr variable in busrules2014 dataset :

   Children |
       Only |
   Contract |
        Max |
   Children |
       Rule |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        669       31.81       31.81
          1 |        211       10.03       41.84
  3 or more |      1,223       58.16      100.00
------------+-----------------------------------
      Total |      2,103      100.00

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