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

   rollover |
       type |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,366       83.66       83.66
          1 |      1,364       13.64       97.30
          2 |        247        2.47       99.77
          9 |         23        0.23      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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