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

      FIRST |
ACCIDENT-YE |
         AR |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,232       52.32       52.32
         83 |          1        0.01       52.33
         90 |        865        8.65       60.98
         91 |      1,632       16.32       77.30
         92 |      1,210       12.10       89.40
         93 |        505        5.05       94.45
         99 |        555        5.55      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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