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

       Last |
Accident,et |
     c-Year |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,191       41.91       41.91
         79 |        394        3.94       45.85
         80 |      1,166       11.66       57.51
         81 |      2,155       21.55       79.06
         82 |      1,314       13.14       92.20
         99 |        780        7.80      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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