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

       Last |
Accident,et |
    c-Month |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,273       42.73       42.73
          1 |        406        4.06       46.79
          2 |        410        4.10       50.89
          3 |        434        4.34       55.23
          4 |        442        4.42       59.65
          5 |        441        4.41       64.06
          6 |        443        4.43       68.49
          7 |        462        4.62       73.11
          8 |        424        4.24       77.35
          9 |        405        4.05       81.40
         10 |        460        4.60       86.00
         11 |        359        3.59       89.59
         12 |        381        3.81       93.40
         99 |        660        6.60      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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