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

       Last |
Accident,et |
    c-Month |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,402       44.02       44.02
          1 |        424        4.24       48.26
          2 |        395        3.95       52.21
          3 |        416        4.16       56.37
          4 |        445        4.45       60.82
          5 |        480        4.80       65.62
          6 |        390        3.90       69.52
          7 |        406        4.06       73.58
          8 |        397        3.97       77.55
          9 |        379        3.79       81.34
         10 |        464        4.64       85.98
         11 |        384        3.84       89.82
         12 |        380        3.80       93.62
         99 |        638        6.38      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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