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

      FIRST |
ACCIDENT-MO |
        NTH |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,232       52.32       52.32
          1 |        345        3.45       55.77
          2 |        312        3.12       58.89
          3 |        363        3.63       62.52
          4 |        361        3.61       66.13
          5 |        345        3.45       69.58
          6 |        371        3.71       73.29
          7 |        367        3.67       76.96
          8 |        376        3.76       80.72
          9 |        373        3.73       84.45
         10 |        343        3.43       87.88
         11 |        299        2.99       90.87
         12 |        358        3.58       94.45
         99 |        555        5.55      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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