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

       LAST |
ACCIDENT-YE |
         AR |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,321       53.21       53.21
         93 |        278        2.78       55.99
         94 |        861        8.61       64.60
         95 |      1,680       16.80       81.40
         96 |      1,395       13.95       95.35
         99 |        393        3.93       99.28
          . |         72        0.72      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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