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

       LAST |
ACCIDENT-YE |
         AR |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,232       52.32       52.32
         90 |        304        3.04       55.36
         91 |      1,000       10.00       65.36
         92 |      1,662       16.62       81.98
         93 |      1,247       12.47       94.45
         99 |        555        5.55      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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