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

       Last |
Accident,et |
    c-Month |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,357       43.57       43.57
          1 |        398        3.98       47.55
          2 |        379        3.79       51.34
          3 |        469        4.69       56.03
          4 |        461        4.61       60.64
          5 |        436        4.36       65.00
          6 |        422        4.22       69.22
          7 |        389        3.89       73.11
          8 |        419        4.19       77.30
          9 |        401        4.01       81.31
         10 |        427        4.27       85.58
         11 |        407        4.07       89.65
         12 |        406        4.06       93.71
         99 |        629        6.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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