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

       LAST |
ACCIDENT-YE |
         AR |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,331       53.31       53.31
       2003 |        249        2.49       55.80
       2004 |        925        9.25       65.05
       2005 |      1,520       15.20       80.25
       2006 |      1,316       13.16       93.41
       9999 |        599        5.99       99.40
          . |         60        0.60      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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