Frequencies for first 10,000 rows of rolinloc variable in vehicle dataset :

Location of |
   Rollover |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,221       82.21       82.21
          1 |        354        3.54       85.75
          2 |         54        0.54       86.29
          3 |        190        1.90       88.19
          4 |         13        0.13       88.32
          5 |        912        9.12       97.44
          6 |        229        2.29       99.73
          9 |         27        0.27      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016