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

       Last |
Accident,et |
    c-Month |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,993       39.93       39.93
          1 |        378        3.78       43.71
          2 |        421        4.21       47.92
          3 |        464        4.64       52.56
          4 |        454        4.54       57.10
          5 |        444        4.44       61.54
          6 |        421        4.21       65.75
          7 |        403        4.03       69.78
          8 |        432        4.32       74.10
          9 |        427        4.27       78.37
         10 |        428        4.28       82.65
         11 |        409        4.09       86.74
         12 |        426        4.26       91.00
         99 |        900        9.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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