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

      FIRST |
ACCIDENT-MO |
        NTH |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,250       52.50       52.50
          1 |        337        3.37       55.87
          2 |        307        3.07       58.94
          3 |        386        3.86       62.80
          4 |        386        3.86       66.66
          5 |        368        3.68       70.34
          6 |        359        3.59       73.93
          7 |        351        3.51       77.44
          8 |        397        3.97       81.41
          9 |        345        3.45       84.86
         10 |        380        3.80       88.66
         11 |        327        3.27       91.93
         12 |        325        3.25       95.18
         99 |        419        4.19       99.37
          . |         63        0.63      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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