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

       Last |
Accident,et |
     c-Year |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,357       43.57       43.57
         83 |        350        3.50       47.07
         84 |      1,113       11.13       58.20
         85 |      2,125       21.25       79.45
         86 |      1,426       14.26       93.71
         99 |        629        6.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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