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

       LAST |
ACCIDENT-YE |
         AR |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,467       54.67       54.67
       2000 |        267        2.67       57.34
       2001 |        919        9.19       66.53
       2002 |      1,551       15.51       82.04
       2003 |      1,246       12.46       94.50
       9999 |        469        4.69       99.19
          . |         81        0.81      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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