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

       Last |
Accident,et |
     c-Year |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,683       46.83       46.83
         86 |        434        4.34       51.17
         87 |      1,094       10.94       62.11
         88 |      1,912       19.12       81.23
         89 |      1,275       12.75       93.98
         99 |        602        6.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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