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

       Last |
Accident,et |
    c-Month |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,191       41.91       41.91
          1 |        404        4.04       45.95
          2 |        378        3.78       49.73
          3 |        410        4.10       53.83
          4 |        402        4.02       57.85
          5 |        475        4.75       62.60
          6 |        428        4.28       66.88
          7 |        423        4.23       71.11
          8 |        406        4.06       75.17
          9 |        396        3.96       79.13
         10 |        471        4.71       83.84
         11 |        438        4.38       88.22
         12 |        398        3.98       92.20
         99 |        780        7.80      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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