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

       LAST |
ACCIDENT-YE |
         AR |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,343       53.43       53.43
       2005 |        241        2.41       55.84
       2006 |        973        9.73       65.57
       2007 |      1,702       17.02       82.59
       2008 |      1,238       12.38       94.97
       9999 |        441        4.41       99.38
          . |         62        0.62      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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