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

      FIRST |
ACCIDENT-MO |
        NTH |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,496       54.96       54.96
          1 |        318        3.18       58.14
          2 |        334        3.34       61.48
          3 |        338        3.38       64.86
          4 |        309        3.09       67.95
          5 |        362        3.62       71.57
          6 |        351        3.51       75.08
          7 |        360        3.60       78.68
          8 |        342        3.42       82.10
          9 |        362        3.62       85.72
         10 |        367        3.67       89.39
         11 |        293        2.93       92.32
         12 |        316        3.16       95.48
         99 |        411        4.11       99.59
          . |         41        0.41      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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