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

       Last |
Accident,et |
    c-Month |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,677       46.77       46.77
          1 |        370        3.70       50.47
          2 |        391        3.91       54.38
          3 |        435        4.35       58.73
          4 |        421        4.21       62.94
          5 |        404        4.04       66.98
          6 |        401        4.01       70.99
          7 |        381        3.81       74.80
          8 |        395        3.95       78.75
          9 |        416        4.16       82.91
         10 |        396        3.96       86.87
         11 |        354        3.54       90.41
         12 |        362        3.62       94.03
         99 |        597        5.97      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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