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

       LAST |
ACCIDENT-YE |
         AR |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,297       52.97       52.97
         91 |        288        2.88       55.85
         92 |        984        9.84       65.69
         93 |      1,553       15.53       81.22
         94 |      1,330       13.30       94.52
         99 |        486        4.86       99.38
          . |         62        0.62      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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