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

      FIRST |
ACCIDENT-MO |
        NTH |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,524       55.24       55.24
          1 |        316        3.16       58.40
          2 |        297        2.97       61.37
          3 |        333        3.33       64.70
          4 |        312        3.12       67.82
          5 |        355        3.55       71.37
          6 |        322        3.22       74.59
          7 |        359        3.59       78.18
          8 |        321        3.21       81.39
          9 |        327        3.27       84.66
         10 |        333        3.33       87.99
         11 |        304        3.04       91.03
         12 |        332        3.32       94.35
         99 |        493        4.93       99.28
          . |         72        0.72      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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