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

       Last |
Accident,et |
     c-Year |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,106       41.06       41.06
         73 |          1        0.01       41.07
         74 |        452        4.52       45.59
         75 |        966        9.66       55.25
         76 |      2,122       21.22       76.47
         77 |      1,613       16.13       92.60
         99 |        740        7.40      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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