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

      FIRST |
ACCIDENT-YE |
         AR |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,317       53.17       53.17
         94 |        844        8.44       61.61
         95 |      1,533       15.33       76.94
         96 |      1,270       12.70       89.64
         97 |        584        5.84       95.48
         99 |        373        3.73       99.21
          . |         79        0.79      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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