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

location of |
   rollover |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,366       83.66       83.66
          1 |        324        3.24       86.90
          2 |         32        0.32       87.22
          3 |        150        1.50       88.72
          4 |         20        0.20       88.92
          5 |        990        9.90       98.82
          6 |         88        0.88       99.70
          7 |          1        0.01       99.71
          9 |         29        0.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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