Frequencies for first 10,000 rows of year variable in accident dataset :

   Accident |
  Date-Year |      Freq.     Percent        Cum.
------------+-----------------------------------
         75 |      9,999       99.99       99.99
         99 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016