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

       Last |
Accident,et |
     c-Year |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,076       40.76       40.76
         77 |          1        0.01       40.77
         78 |        410        4.10       44.87
         79 |      1,128       11.28       56.15
         80 |      2,175       21.75       77.90
         81 |      1,526       15.26       93.16
         99 |        684        6.84      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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