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

 school bus |
    related |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,931       99.31       99.31
          1 |         69        0.69      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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