Frequencies for sch_bus variable in person dataset :

 School Bus |
    Related |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,232       93.19       93.19
          1 |         90        6.81      100.00
------------+-----------------------------------
      Total |      1,322      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016