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

       Last |
Accident,et |
     c-Year |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,677       46.77       46.77
         87 |        335        3.35       50.12
         88 |        999        9.99       60.11
         89 |      1,886       18.86       78.97
         90 |      1,506       15.06       94.03
         99 |        597        5.97      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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