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

   rollover |
       type |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,354       83.54       83.54
          1 |      1,431       14.31       97.85
          2 |        200        2.00       99.85
          9 |         15        0.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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