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

      FIRST |
ACCIDENT-YE |
         AR |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,250       52.50       52.50
         92 |        805        8.05       60.55
         93 |      1,557       15.57       76.12
         94 |      1,301       13.01       89.13
         95 |        605        6.05       95.18
         99 |        419        4.19       99.37
          . |         63        0.63      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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