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

       Last |
Accident,et |
    c-Month |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,683       46.83       46.83
          1 |        375        3.75       50.58
          2 |        368        3.68       54.26
          3 |        421        4.21       58.47
          4 |        401        4.01       62.48
          5 |        400        4.00       66.48
          6 |        381        3.81       70.29
          7 |        415        4.15       74.44
          8 |        413        4.13       78.57
          9 |        376        3.76       82.33
         10 |        404        4.04       86.37
         11 |        373        3.73       90.10
         12 |        388        3.88       93.98
         99 |        602        6.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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