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

       Last |
Accident,et |
    c-Month |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,065       30.65       30.65
          1 |        529        5.29       35.94
          2 |        483        4.83       40.77
          3 |        513        5.13       45.90
          4 |        496        4.96       50.86
          5 |        575        5.75       56.61
          6 |        469        4.69       61.30
          7 |        499        4.99       66.29
          8 |        550        5.50       71.79
          9 |        552        5.52       77.31
         10 |        507        5.07       82.38
         11 |        554        5.54       87.92
         12 |        479        4.79       92.71
         99 |        729        7.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016