Frequencies for first_yr variable in vehicle dataset :

      FIRST |
ACCIDENT-YE |
         AR |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        539       70.55       70.55
         92 |        104       13.61       84.16
         93 |         24        3.14       87.30
         94 |         31        4.06       91.36
         95 |         11        1.44       92.80
         99 |         53        6.94       99.74
          . |          2        0.26      100.00
------------+-----------------------------------
      Total |        764      100.00

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