Frequencies for last_yr variable in vehicle dataset :

       LAST |
ACCIDENT-YE |
         AR |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        325       51.92       51.92
       2001 |         16        2.56       54.47
       2002 |        119       19.01       73.48
       2003 |         44        7.03       80.51
       2004 |         63       10.06       90.58
       9999 |         58        9.27       99.84
          . |          1        0.16      100.00
------------+-----------------------------------
      Total |        626      100.00

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