Frequencies for first 10,000 rows of sch_bus variable in person dataset :

 School Bus |
    Related |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,970       99.70       99.70
          1 |         30        0.30      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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