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

  number of |
      motor |
    vehicle |
   striking |
non-motoris |
          t |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,125       91.25       91.25
          1 |        856        8.56       99.81
          2 |         17        0.17       99.98
          3 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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