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

      FIRST |
ACCIDENT-MO |
        NTH |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,967       49.67       49.67
          1 |        397        3.97       53.64
          2 |        360        3.60       57.24
          3 |        386        3.86       61.10
          4 |        371        3.71       64.81
          5 |        410        4.10       68.91
          6 |        389        3.89       72.80
          7 |        375        3.75       76.55
          8 |        371        3.71       80.26
          9 |        333        3.33       83.59
         10 |        431        4.31       87.90
         11 |        370        3.70       91.60
         12 |        348        3.48       95.08
         99 |        492        4.92      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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