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

      FIRST |
ACCIDENT-YE |
         AR |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,321       53.21       53.21
         93 |        776        7.76       60.97
         94 |      1,537       15.37       76.34
         95 |      1,311       13.11       89.45
         96 |        590        5.90       95.35
         99 |        393        3.93       99.28
          . |         72        0.72      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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