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

      First |
Accident,et |
    c-Month |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,357       43.57       43.57
          1 |        408        4.08       47.65
          2 |        437        4.37       52.02
          3 |        444        4.44       56.46
          4 |        435        4.35       60.81
          5 |        455        4.55       65.36
          6 |        415        4.15       69.51
          7 |        368        3.68       73.19
          8 |        423        4.23       77.42
          9 |        408        4.08       81.50
         10 |        414        4.14       85.64
         11 |        418        4.18       89.82
         12 |        389        3.89       93.71
         99 |        629        6.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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